Connect methods: Wireless Bluetooth Software: For ZELLO Connection distance: 30M Supported operating systems: For Android 4.0 and above, for iOS 8.0 and above Specification: Battery: CR2032 (installation required) Working hours: At least 200 days How to use: 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. Enable Wireless and Bluetooth on the mobile phone. Step 3. Open the Zello app, click "Options", click "Push-to-Talk", click the button and wait for a while. Once connected, it will show "PTT-Z01". Select "PTT-Z01" and choose "Hand to Talk". Step 4. Press the button to communicate. Material: Plastic Color: Black Package Contents: 1 x Bluetooth PTT Button 1 x Strap Note: Light reflection and different displays may cause slight color variations between the item in the picture and the actual product. Measurement allows an error of +/- 1-3 cm.