Connect methods: Wireless Bluetooth Software: Compatible with Zello Connection distance: 30 meters Supported operating systems: Android 4.0 and above, iOS 8.0 and above Specifications: Battery: CR2032 (included) Working time: Up to 200 days How to use: Step 1: Install the battery Remove the cover, insert the CR2032 battery, and switch the power to “ON”. Step 2: Enable Wi-Fi and Bluetooth on your mobile device Step 3: Open the Zello app, go to “Options” > “Push-to-Talk”, tap the button and wait for the device to appear as “PTT-Z01”. Select “PTT-Z01” and choose “Hand-to-Talk”. Step 4: Press the button to communicate. Material: Plastic Color: Black Package contents: 1 x Bluetooth PTT Button 1 x Strap Note: Color may vary slightly due to screen settings and lighting conditions. Measurement tolerance: ±1–3 cm.