Sena 10U-SH-02 10U Motorcycle Bluetooth Communication System with Handlebar Remote for Shoei Neotec Helmet Invisible beauty with custom design. Charging time- 3 hours. Type- Lithium polymer. Talk time- 10 hours Safe and easy operations by Bluetooth Low Energy Handlebar Remote Bluetooth intercom up to 1.6 kilometers (1.0 mile); Four-way intercom ; Universal Intercom Music sharing; Built-in FM radio tuner with a station scan and save function Voice prompts; Smartphone App for iPhone and Android