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 anytime How to use it: Step 1. Install the battery: Turn the button to remove the chip inside, install the extra battery, and turn the adjacent switch to "ON". Step 2. Enable Wireless and Bluetooth on the mobile phone. Step 3. Open the Zello app, click "Push-to-Talk", then press the button and wait momentarily. When connected, "PTT-Z01" will appear; select "PTT-Z01" and choose "Hand to Talk". Step 4. Press the button to initiate communication. Important Notes: 1. This product is designed exclusively for use with Zello software. 2. The product requires Bluetooth and network connectivity to function. 3. Cannot be used when the Zello app is closed. 4. After initial connection, reconnection is not necessary; simply open the app to resume operation. 5. If the app has been idle for a long time, communication can be resumed by lightly pressing the PTT button. 6. For phones, select the appropriate button press or trigger setting. Color: black Material: plastic Package Contents: 1 x Walkie Talkie Control Button Only the above package content is included; other items are not part of this package. Note: Lighting reflections and display differences may cause slight variations between the item color in the image and the actual product. Measurement error allowance is +/- 1-3 cm.