The Momentum Bluetooth Integrated Full-Face Helmet Sena has been at the forefront of Bluetooth innovation for the motorcycle industry for years & is breaking new ground with our first of a kind Bluetooth integrated full-face helmet, Momentum. Sena has engineered this helmet from the ground up & for the first time riders will be able to hear our industry-leading technology the way it was meant to be heard, the ideal integration of Sena’s technology creates an unrivaled audio experience. Momentum puts our top of the line & proven 20S technology inside a sleek & safe fiberglass shell. This state of the art helmet was created with riders in mind & is preinstalled & ready to ride straight out of the box. Optimal speaker position combined with our Advanced Noise Control technology allows riders to effortlessly take & make calls, listen to music through their phone or the built in FM radio, audio multitasking, hear turn-by-turn GPS directions, & even chat through the built-in intercom with up to 8 other riders at a distance of up to 1.6 km (1 mile). General Talk Time: Momentum: 20 hours Weight: Momentum: 1, 690 g (59.61 oz) (M size) Helmet Shell: Composite Fiberglass Shell 2 shells Visor: Quick release system Scratch resistant UV resistant Pinlock ready Comfort: Removable & washable Breathable Quick dry liner Laser-cut foam Chin curtain Breath deflector Security: Double D-ring Reinforced chin strap Reflective safety patch Multi-density EPS Neck Roll Ventilation System: Top vent Chin vent Exhaust port 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 (1.0 miles) in open terrain Audio Advanced Noise Control™ Built-in SBC Codec Wide volume control Sample rate: max. 48 k Hz (DAC) FM-Radio Built-in FM radio with RDS AF (Radio Data System Alternate Frequencies) Radio region: worldwide Radio frequency specifications: 64 ~ 108 M Hz 10 preset station memory with automatic scan function Battery Charging time: 2.5 hours Lithium Polymer Battery Certificates Electronics: FCC, IC Helmet: DOT, ECE Note Please note that as long as nothing else is written in the article description, all helmets that have a visor as standard will be delivered with a clear one, even if it is shown differently.