Connect methods:Wireless Bluetooth<br>Software:For ZELLO<br>Connection distance:30M<br>Supported operating systems:For Android 4.0 above,for IOS 8.0 above<br><br>Specification:<br>Battery:CR2032(need install)<br>Working hours:at least 200 days<br>How to use it:<br>Step 1.Install the battery<br>Turn this button to remove the chip inside, install the extra battery and turn the switch next to it to "ON".<br>Step 2.Open the Wireless and Bluetooth on the mobile phone<br>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<br>Step4.Click the button to make a communication.<br>Material: plastic<br>colour: black<br><br>Package Contents:<br>1 x Bluetooth PTT Button<br>1 x Strap<br><br>Only the above package content, other products are not included.<br>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.