The built-in 3.7V/2000mAh battery takes 2.5 hours on a single charge and provides 14 hours of PTT time, 12 hours of music playback at maximum volume and 90 hours of standby time<br>When the Bluetooth microphone is connected to your radio, simply press the PTT button on the microphone to talk to your partner<br>Not only can it connect to your radio, but also to your iPhone/Android phone or tablet. When the Bluetooth microphone is connected to your phone, you can use it as a small Bluetooth speaker to play music or answer calls<br>The 2-pin microphone port is compatible with Motorola radios with a 2-pin headphone jack. Don't work for Kenwood, not for Pershing, not for Woolson, not for Baofeng, not for Midland Radio<br><br>Specifications:_x000D_<br><br><br>Material: PVC<br>Bluetooth version: 4.2<br>Bluetooth protocol: HFP/HSP/A2DP/AVRCP/SPP<br>Transmission range: 10m<br>Transmission power: CLASS2.4dbm<br>Sensitivity: 80dBm&lt;0.1% bit error rate<br>Audio performance: SBC decoding<br>Audio noise ratio: &ge;75dB<br>Speaker power: 1W/8R(116dB)<br>Headphone jack: 3.5mm (PPT headset is supported)<br>Battery capacity: 2000mAh/3.7V