Dellking H2 PTT Speaker Microphone for Android Zello App, for ESChat App and for Grouptalk App, Bluetooth Walkie Talkie Headset

*** This device is certified by Zello, GroupTalk, and more.... Product Specifications: It can be used with smartphone apps such as ZELLO, GroupTalk, etc. Feature of push to talk PTT mic/microphone 1. BT3.0 aghsp, aghfp profiles supported 2. Connect with mobile phone for calls handling and stereo music 3. Switch to mono and stereo 4. PTT button support 5. Connect with various radio Bluetooth adapter 6. Support 3.5mm headset connector 7. Dsp noise suppression, crystal voice quality 8. Compatibility with various phone 9. Working time: 8hs 10. Standby time: 100hs 11. Long life lithium battery (750ma/3.7v) Zello App - Android Phone, iPhone, iPad Azetti App - PTT Talking; Phone Call (make sure phone supports Bluetooth A2DP and AVRCP) Viber App - Phone Call (make sure phone supports Bluetooth A2DP and AVRCP) Stereo Music Play (make sure phone supports Bluetooth A2DP and AVRCP) GPS Navigator Operation - make sure the GPS have the Bluetooth function