Connect methods: Wireless Bluetooth Software: For ZELLO Connection distance: 30M Supported operating systems: For Android 4.0 above, for IOS 8.0 above Battery: CR2032(need install) Working hours: at least 200 days Wide Application: Suitable for car, motorcycle, bicycle riding, for easy intercom at any time How to use it: Step 1. Install the battery: Turn this button to remove the chip inside, install the extra battery and turn the switch next to it to "ON". Step 2. Open the Wireless and Bluetooth on the mobile phone. Step 3. Open the Zello app,click"Options",click"Push-to -Talk“,click the button wait for a while,after connect it will show "PTT-Z01",click "PTT-Z01",choose "Handto Talk. Step4. Click the button to make a communication. Matters Needing Attention: 1. The product is only targeted at Zello's software devices. 2. The product needs to be used with Bluetooth and network enabled. 3. Cannot be used while exiting Zello software. 4. After connecting, there is no need to reconnect, you can directly operate by opening the APP always online. 5. If the program is not used for a long time, you can also send it by lightly touching the PPT button. 6. For apple phones need to choose whether to press buttons or trlgger. 7. You can specify a contact person or team, and press to make a call. Package Including: 1 x Wireless Bluetooth PTT Control Button 1 x CR2032 Battery 1 x User Manual 1 x Strap