--- product_id: 116132624 title: "KT-G3-A USA 4G GSM AUTO Relay Switch 12V Solenoid Remote Control Box Wireless Gate Opener 2CH Output HOG Trap Aircraft Pre-Heater System 30A Relay Contact(for AT&T and T-Mobile Volte 2022 New)" brand: "kiaotime" price: "AR$575088" currency: ARS in_stock: true reviews_count: 8 category: "Kiao Time" url: https://www.desertcart.com.ar/products/116132624-kt-g3-a-usa-4g-gsm-auto-relay-switch-12v store_origin: AR region: Argentina --- # Caller ID phone control, no call charges 4G/3G USA multi-band LTE 30A high-power relay contact KT-G3-A USA 4G GSM AUTO Relay Switch 12V Solenoid Remote Control Box Wireless Gate Opener 2CH Output HOG Trap Aircraft Pre-Heater System 30A Relay Contact(for AT&T and T-Mobile Volte 2022 New) **Brand:** kiaotime **Price:** AR$575088 **Availability:** ✅ In Stock ## Summary > 🚀 Unlock limitless remote power control—because your smart devices deserve smarter switches! ## Quick Answers - **What is this?** KT-G3-A USA 4G GSM AUTO Relay Switch 12V Solenoid Remote Control Box Wireless Gate Opener 2CH Output HOG Trap Aircraft Pre-Heater System 30A Relay Contact(for AT&T and T-Mobile Volte 2022 New) by kiaotime - **How much does it cost?** AR$575088 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/116132624-kt-g3-a-usa-4g-gsm-auto-relay-switch-12v) ## Best For - kiaotime enthusiasts ## Why This Product - Trusted kiaotime brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Heavy-Duty 30A Relay:** Manage high-current devices like gates, hog traps, and aircraft heaters with industrial-grade reliability. - • **Instant SMS Feedback:** Stay in the loop with real-time SMS confirmations ensuring your commands were received and executed. - • **Multi-Platform Programming:** Customize control via Android app, SMS, PC software, or optional WiFi hotspot for ultimate flexibility. - • **Global Control, Local Power:** Harness USA’s AT&T & T-Mobile 4G networks for seamless remote relay switching anywhere. - • **Zero-Minute Phone Activation:** Activate your devices via phone call without using minutes—smart caller ID recognition means no wasted charges. ## Overview The KT-G3-A USA 4G GSM Auto Relay Switch is a cutting-edge 2-channel, 30A relay device designed for remote control of high-power systems like gates, hog traps, and aircraft heaters. Compatible exclusively with AT&T and T-Mobile 4G/3G networks in the USA, it enables phone-call activation without consuming call minutes, thanks to intelligent caller ID recognition. With multi-platform programming options including Android app, SMS, PC software, and optional WiFi, it offers unparalleled convenience and real-time SMS feedback to confirm command execution. Built for professionals demanding reliable, high-current remote switching with global reach within supported networks. ## Description KT-G3 Upgrade Features on the basis of KT-G21> Upgrade to 30A high power relay contact2> Use big relay connection screws for easy wiring3> WiFi and RF433Mhz features are optional to save relay working powerDescription4G Relay Switch works on the basis of 4G/3G network, so it requires a prepaid pay-as-you-go 4G SIM card from your cellular provider, No minutes are used as it doesn't actually answer the calls - it recognize caller ID and then reject your phone call to turn on the switch automatically.Its working way as same as your home wall mount manual press lights switch, the only difference is we changed manual press working way to Cell Phone wireless remote control. So the range of this relay switch is truly unlimited, You can remote control your home appliances anytime anywhere in the world!Applications:HOG TRAP systemAircraft engine heaterHome or office lighting controlGSM gate openerSpecification:Working Voltage: DC 12-24V@1-2AMaterial: ABSOutput: 2 channel relay, NO/NC,COMRelay Contact: 30A 250VAC/30VDCPower Consumption: Standby status:60mA@12V, Working status:100mA@12VMemory: Relay memory after AC power outageControl way: Phone Call/SMS/Timer control/Ralated working Working Humidity: >65%Working Temperature: -25 - +55℃WiFi LAN hotspot access: OptionalRadio Frequency: 433.92MHZ (for wireless keyfob,optional)Relay device dimension:7"(L) x 4.75"(W) x 2.25"(H)Package Dimension:8.75"(L) x 6.5"(W) x 2.75"(H)4G Module Bands: FDD-LTE:B2/ B4/ B12, 3G-WCDMA:B2/B4/B5 Compatible providers: USA: AT&T, T-MobileIn the Box:1 x 2CH 4G GSM Relay Switch1 x USB to micro-USB cable1 x Internal antenna1 x External high gain antenna1 x 12V 1ADC power adapter1 x U-disk manual and software Review: Works with ATT - Just wanna say this thing works very good. The only issue I had was using the sim.card someone else mentioned. Speed talk , complete junk. Using this for a remote hog trap speed talk would usually say all lines are busy over and over. Calls wouldn't go through. I'm in a rural area where Verizon and att gets through 99 percent of the time but speed talk was a joke. Went and got a 10 dollar att sim card and activated on a prepaid 30 dollar a month plan. It cost more but it works. No more 10 min to boot after plug in. Also u need to plug this into your computer with the cable and open the program that comes on the thumb drive. Once you connect it you can see the EMIN number plain as day. This is how you set this up. It's very easy to do and using the att sim card was worth the extra money to have something reliable. Review: How to wire look closely - Works good. need some sort of manuel to help wire it up. ## Features - USA MULTI-BANDS 4G MODULE enable relay switch device can work with AT&T, T-Mobile 4G and 3G network, NOT work in other countries - 2 CHANNEL RELAY SWICHES with 30A HIGH RELAY CONTACT enable you to control feral hog trap system, auto gate, aircraft engine heater and lights etc. anytime anywhere in the world - FREE CHARGE PHONE CALL No.1 relay can be remote controlled by phone call, no minutes are used as it doesn't actually answer the calls - it recognize caller ID and then reject your phone call to turn on/off the switch automatically - SMS FEEDBACK CONFIRMATION relay device will send you sms feedback after phone call or sms remote control, so you will know that relay switch received your command and act correctly - MULTI PROGRAMMING WAY Android APP software,SMS text programming way,Windows PC software via USB,WiFi LAN hotspot access on PC(WiFi module optional) ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07Q7PKW5Z | | Best Sellers Rank | #153,096 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #565 in Garage Door Keypads & Remotes | | Brand | KiaoTime | | Brand Name | KiaoTime | | Coil Resistance | 30 | | Coil Voltage | 12 volts | | Connector Type | Screw | | Contact Current Rating | 30 A | | Contact Material | Silver | | Contact Type | 2no 2nc | | Current Rating | 30 A | | Customer Reviews | 4.0 out of 5 stars 141 Reviews | | Included Components | power adapter,U-disk,external antenna | | Manufacturer | KiaoTime | | Maximum Switching Current | 30 A | | Maximum Switching Voltage | 24 volts | | Minimum Switching Voltage | 12 volts_of_direct_current | | Mounting Type | Surface Mount | | Number of Items | 1 | | Operation Mode | Automatic | | Part Number | KT-G3 | | UPC | 603149819177 | | Unit Count | 1 Count | ## Product Details - **Connector Type:** Screw - **Contact Material:** Silver - **Contact Type:** 2no 2nc - **Current Rating:** 30 Amps - **Mounting Type:** Surface Mount ## Images ![KT-G3-A USA 4G GSM AUTO Relay Switch 12V Solenoid Remote Control Box Wireless Gate Opener 2CH Output HOG Trap Aircraft Pre-Heater System 30A Relay Contact(for AT&T and T-Mobile Volte 2022 New) - Image 1](https://m.media-amazon.com/images/I/61gsz9+9XwL.jpg) ## Available Options This product comes in different **Color** options. ## Questions & Answers **Q: How many different phone number can this unit store and recognize?** A: you can add 8 numbers (3 administrators and 5 general users) on app software, but on PC software, you can add much more 42 numbers so total 50 numbers. AMROAD Seller · July 8, 2019 **Q: At&t is requiring an imei number to register the sim card, what am i supposed to do** A: Ariana - Can't speak to how AT&T handles their SIM card registration ... don't have a clue. I chose to purchase a SIM card offered by PayGo Ultra Mobile (which uses Verizon's network). I placed the SIM card into a smartphone to get the SIM card registered with PayGo and a phone number established. After a phone number was assigned to the SIM card, the SiM card was instilled in the remote switch. Not positive, but I beleave I could have registered the SIM card and received a phone number by just calling the 800 number for PayGo's customer service department and providing them with the SIM card's serial number. **Q: When will these be available again** A: Check with Amazon **Q: Will this work now that at&t has done away with 3g?** A: yes, it works on ATT 4G VoLTE network from May 2011, NEW stock items. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works with ATT *by C***Y on February 9, 2023* Just wanna say this thing works very good. The only issue I had was using the sim.card someone else mentioned. Speed talk , complete junk. Using this for a remote hog trap speed talk would usually say all lines are busy over and over. Calls wouldn't go through. I'm in a rural area where Verizon and att gets through 99 percent of the time but speed talk was a joke. Went and got a 10 dollar att sim card and activated on a prepaid 30 dollar a month plan. It cost more but it works. No more 10 min to boot after plug in. Also u need to plug this into your computer with the cable and open the program that comes on the thumb drive. Once you connect it you can see the EMIN number plain as day. This is how you set this up. It's very easy to do and using the att sim card was worth the extra money to have something reliable. ### ⭐⭐⭐⭐⭐ How to wire look closely *by B***D on July 27, 2026* Works good. need some sort of manuel to help wire it up. ### ⭐ This may no longer be supported by AT&T *by C***S on June 22, 2022* I purchased this unit in April 2021. I used an H2O pay as you go sim card (it uses the AT&T network). It worked well. In March 2022 I purchased another KT-G3-A. I purchased a new H2O pay as you go sim card. I can not get this unit to work with the New AT&T 4G network. Now neither KT-G3-A auto relay switch works. Looking at the reviews after Feb 2022 I can not find a single review where the switch works. Does this switch work???? If it does please provide support so we can get it working. If you are reading the reviews of this product that occurred prior to March of 2022 they are meaningless since AT&T have changed their network to the new 4G. Also, in an article on their web page the seller told us that the test they conducted in Texas was unsuccessful. ## Frequently Bought Together - KT-G3-A USA 4G GSM AUTO Relay Switch 12V Solenoid Remote Control Box Wireless Gate Opener 2CH Output HOG Trap Aircraft Pre-Heater System 30A Relay Contact(for AT&T and T-Mobile Volte 2022 New) - JDMSPEED 60 Pound Shaved Door Handle Trunk Solenoid Popper Kit Street Rod Design to Pop Open The Toughest Doors, Hoods and Trunks 60lb - $5 Alarm SIM Card for GSM Home/Business Security Alarm System --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.com.ar/products/116132624-kt-g3-a-usa-4g-gsm-auto-relay-switch-12v](https://www.desertcart.com.ar/products/116132624-kt-g3-a-usa-4g-gsm-auto-relay-switch-12v) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-10-06*