Connection Methods Wireless Bluetooth Software For ZELLO Connection Distance 30M Supported Operating System For Android 4.0 and above, for IOS 8.0 and above Specification Battery CR2032 need to be installed Working Time at least 200 hours How to use it Step 1. Install the battery. Turn the button to remove the chip inside, install the etra battery and turn the power switch to ON. Step 2. Open the wireless and Bluetooth on the mobile phone. Step 3. Open the Zello app, click , click PushtoTalk, click the button and wait for a while, after connection, PTTZ01 will appear, click PTTZ01, select Handto Talk. Step 4. Click the button to communicate. Material plastic Color black Package Contents 1 Bluetooth PTT Button, 1 Strap Only the above package contents, other products are not included. Note Light reflection and different monitors may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is 13 cm.