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 Battery: CR2032 (installation required) Working hours: at least 200 days Wide Application: Suitable for car, motorcycle, and bicycle riding, enabling easy intercom communication at any time How to use it: Step 1. Install the battery: Turn the button to remove the chip inside, install the extra battery, and turn the switch to "ON". Step 2. Enable Wireless and Bluetooth on the mobile phone. Step 3. Open the Zello app, click "Push-to-Talk", press the button and wait for a while. When connected, it will show "PTT-Z01", select "PTT-Z01", and choose "Hand to Talk". Step 4. Press the button to initiate communication. Matters Needing Attention: 1. The product is designed exclusively for use with Zello software. 2. The product requires Bluetooth and network connectivity to function. 3. Cannot be used when Zello software is closed. 4. After initial connection, reconnection is not necessary; simply open the app to resume operation. 5. If the app has been inactive for a long time, communication can be resumed by lightly pressing the PTT button. 6. For phones, select the appropriate button or trigger setting. Color: black Material: plastic Package Contents: 1 x Walkie Talkie Control Button Only 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 to differ slightly from the actual item. Measurement may vary by +/- 1-3cm.