BT-S3 Motorcycle Helmet Wireless Bluetooth Earphone Waterproof Handsfree Interphone Walkie talkie with FM Radio1. The wireless headset allows the mobile phone up to 10 meters. 2. Bike to bike intercom for driver and passenger or two separate bikes to 800 1000 meters. 3. Call, answer calls, reject calls, hang up calls. 4. Receive a phone call automatically. 5. Support audio transfer. 6. Supports Dialing number. 7. Function of FM Radio. Specification: Package Weight One Package Weight 0. 34kgs 0. 75lb One Package Size 17cm * 11cm * 5. 5cm 6. 69inch * 4. 33inch *