Will it discreetly let me know if house door is open? Or is it an alarm that people walking by outside can hear?

You can set it to text you or to have the hub alarm inside the house go off. My hub is in my 2nd floor bedroom and alarms on on my doors on 1st floor. So people opening the doors don't hear it I did that because I have an dementia patient at home and it notifies me if they try to leave house when I am sleeping but doesn't scare them

Can app alert you every time do is opened?

Yes, you can set up notifications in the app

I can not get the door sensors to bind . i have the app and hub successfully connected to wifi. door sensors blink one red light with button is pushed

Read the QR code on the sensor with your app first.

Can the hub play a siren sound if the door opens or do you have to buy the seperate siren? I want to get a notice on my phone and an alarm sound.

The SpeakerHub can play a siren sound, but keep in mind it is not a loudspeaker (like our sirens are). The sound level is closer to an Echo Dot; it may not be heard throughout your home. But I have seen the SpeakerHub placeed in foyers and closer to the door locations, where it should be heard very well. This is also a good location, because you can have the SpeakerHub say "system armed" and "system disarmed" as you leave or arrive through that door. You should also take a look at our FlexFob and AlarmFob. https://www.amazon.com/dp/B0978V4WQC?ref=myi_title_dp&th=1 https://www.amazon.com/dp/B092M1QQ5M?ref=myi_title_dp&th=1 And here is our loudest siren: https://www.amazon.com/dp/B0BZHPQ1PK?ref=myi_title_dp&th=1 Enjoy! Eric with YoSmart

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YoLink LoRa 1/4 Mile Longest Range Smart Window & Door Sensor, Door Left Open Reminders, Alexa, IFTTT, Home Assistant, 3-Pack (Hub Included)

Product ID: 522257756

Details

Brand
YoLink
Colour
3-pack without
Compatible devices
Smartphone
Item dimensions L x W x H
8 x 8 x 11
Power source
Battery

📡400m LoRa range

🔋5-year battery life

🎙️Text-to-speech alerts

Description

🔐 Secure smarter, live freer—your home’s longest-range guardian awaits!

SMART AUDIO ALERTS - Hear your home’s status with customizable text-to-speech messages and tones from the unique SpeakerHub.
ULTRA LONG 1 4 MILE RANGE - Stay connected even in basements, garages, or separate buildings with LoRa tech that outperforms WiFi.
5 YEARS OF BATTERY FREEDOM - Pre-installed alkaline batteries keep your sensors running worry-free for half a decade—no monthly fees, no hassle.
EFFORTLESS SETUP EXPANSION - Scan, stick, and secure your home in minutes; scale up with 300+ compatible devices for a truly smart ecosystem.
OFFLINE DEVICE TO DEVICE PAIRING - Your security stays active even during internet or power outages—pair sensors with alarms for autonomous protection.

The YoLink LoRa Smart Window & Door Sensor 3-pack with Hub offers industry-leading 400-meter wireless range using low-power LoRa technology, ensuring reliable connectivity beyond typical WiFi limits. Featuring a unique SpeakerHub with customizable text-to-speech alerts, it provides real-time door/window status and left-open reminders. With pre-installed batteries lasting up to 5 years and effortless installation via 3M tape, this system supports over 300 devices and enables offline device pairing for uninterrupted security—all without monthly fees.

Specifications

ASIN	B0BZ88QB5P
ASIN	B0BZ88QB5P
Alert Type	Motion Only
Batteries	6 AAA batteries required. (included)
Battery Average Life	5 years
Battery Cell Type	Alkaline
Best Sellers Rank	#151,027 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #141 in Home Security Door & Window Sensors
Brand	YoLink
Built-In Media	Detector
Color	3-pack without hub
Compatible Devices	Smartphone, Tablet
Connectivity Technology	Wireless
Control Method	App, Voice
Customer Reviews	4.5 4.5 out of 5 stars (91)
Customer reviews	4.5 4.5 out of 5 stars (91)
Date First Available	26 March 2023
Installation Method	Self-Adhesive
Item Dimensions	8 x 8 x 11 centimeters
Item Type Name	Door Sensor
Item Weight	66 Grams
Item model number	YS1604+3YS7704
Manufacturer	YoLink
Manufacturer	YoLink
Maximum Range	620 Meters
Mfr Part Number	YS7704-UC*3
Model Number	YS1604+3YS7704
Power Source	Battery Powered
Product Dimensions	8 x 8 x 11 cm; 66 g
Sensor Technology	LoRa
UPC	810121540510
Unit Count	4.0 Count
Voltage	1.5 Volts (DC)

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