SOUND SYSTEM 2.0 stereo system Speakers: 2 dynamic full range stereo speakersPassive radiators: 1 membraneFrequency response: 40 Hz ~ 18 KHz THD 90 dB POWER 20 W CONNECTIVITY Bluetooth v4.1, class II 3.5 mm audio input MICROPHONE Sensitivity: -42 dB BATTERY Capacity: 2000 mAh Type: lithium polymer Playback battery life: up to 9 hours * Charging system: microUSB Charging time: 4.5 hours OTHER FEATURES It supports HSP / HFP / A2DP /AVRCP protocols Up to 10 m distance range* Approximate battery life. Higher volume means higher battery consumption Country of Origin: China
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