Sena SF1 Motorcycle Bluetooth Intercom System Built for communicating directly with a passenger, the Sena SF1 motorcycle helmet Bluetooth intercom system provides 2-way intercom communication up to 100 metres in open terrain. The SF1 lets you pair to your device so you can stream music, take and make phone calls, and hear turn-by-turn GPS directions. The SF1 also allows VOX Phone commands and includes capabilities such as Audio Multitasking™, Quick Charging and microphone mute options. Motorcycle Helmet Mesh Bluetooth Intercom Features: GENERAL Main module dimensions: 73.3 x 38.7 x 16.6. Speaker driver unit dimensions: 32.0 x 7.0 mm. Wired boom microphone length: 183 mm. Wire between speakers length: 590 mm. Main module weight: 35 grams. Operating temperature: -10 - 55 °C. BLUETOOTH Bluetooth 5.1. Headset profile (HSP). Hands-Free profile (HFP). Advanced audio distribution profile (A2DP). Audio video remote control profile (AVRCP). INTERCOM Working distance: up to 100 m in open terrain. Supports up to 2 riders. AUDIO Noise Cancellation: Advanced Noise Control™. Codec: Built-in SBC Codec. HD Voice enabled for high-quality phone call audio. BATTERY Talk time: up to 13 hours. Charging time: 1.5 hours. Quick charging: 30 minutes of charging equals 4 hours intercom. Charging temperature: 0–45 °C. Type: Lithium polymer battery. CERTIFICATES CE. FCC. IC.