Sena ACS10 Motorcycle Bluetooth Intercom System (Arai Quantic) The Sena ACS10 motorcycle Bluetooth intercom system is designed specifically for the Arai Quantic motorcycle helmet. The discrete ACS10 headset consists of HD Speakers, a microphone, three-button control and a battery which are all easily installed into the Quantic motorbike helmet. The Sena ACS10 was designed for the exact interior recesses of the Quantic, allowing for the perfect fit. Motorcycle Helmet Bluetooth Intercom Features: GENERAL Main module dimensions: 77 x 68 x 58 mm. Speaker driver unit dimensions: 40 x 7.2 mm. Wired microphone length: 200 mm. Wire between speakers length: 100 mm. Main module: 63 grams. Operating temperature: -10–55°C. BLUETOOTH Bluetooth 4.1. Headset profile (HSP).. Hands free profile (HFP). Advanced audio distribution profile (A2DP). Audio video remote control profile (AVRCP). INTERCOM Working distance up to 1.6 km in open terrain. Supports up to 4 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 10 hours. Charging time: 2.5 hours. Charging temperature: 0–45°C. 2 x built-in 300 mAh lithium polymer battery. CERTIFICATES CE. FCC. IC. UKCA.