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 to it to "ON". . Open the Wireless and Bluetooth on the mobile phone. Step 3. Open the for Zello app,click"",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 phones need to choose whether to press buttons or trlgger. Colour:black Material:plastic Package Contents: 1 x Walkie Talkie Control Button Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.