For ZELLO Wireless Bluetooth Push Button Car Riding Transmitter 1. Can be specified to send personal or team, press PTT easily send private chat group chat separate options, enjoy communication, fast, convenient 2. BLE communication mode, does not affect the phone to connect to other Bluetooth products fast search, fast connection, ultra-low power consumption, keep connected and transfer data 3. After linking ZELLO, you can easily press the button to send information directly after setting up, which is safer for driving 4. No need to take out your cell phone to operate the simple button to talk, lock screen state black screen also does not affect the use Parameters: 1. Support software: ZELLO 2. Support operating system: for Android 4.0iOS 8.0 and higher versions 3. Connection distance: 30m 4. Suitable for cars, self-driving motorcycles, bicycles, safe riding, convenient at any time to talk to each other 5. Waterproof grade: IP7 level 6. Power supply: button battery CR2032 (delivery does not include) 7. Working hours: more than 200 days 8. Size: 7.5 x 5.5 x 3cm 9. Weight: 23.8g Packing list: - PPT button x 1 - Strap x 1