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> 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> Package Contents:<br> 1 x Bluetooth PTT Button<br> 1 x Strap<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.