Connect methods:Wireless BluetoothSoftware:compatible with ZELLOConnection distance:30MSupported operating systems:compatible with Android 4.0 above,compatible with IOS 8.0 aboveSpecification:Battery:CR2032(need install)Working hours:at least 200 daysHow to use it:Step 1.Install the batteryTurn 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 phoneStep 3.Open the Zello app,click"Options",click"Push-to -Talk",click the button wait compatible with a while,after connect it will show "PTT-Z01",click "PTT-Z01",choose "Handto TalkStep4.Click the button to make a communication.Material: plasticcolour: blackPackage Contents:1 x Bluetooth PTT Button1 x StrapOnly 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.