Sena 10S Bluetooth Headset Dual Pack The tried and true Smh-10 has received a overdue update in the form of the Sena 10S. The slimmer profile hides a leap in technology, as the 10S enriches your riding experience by adding communication with up to four riders via crystal-clear HD audio, up to 1.6 km (1 mile) away, through the One Touch Group Intercom. The universal intercom feature allows you to communicate with Sena and non-Sena communicators alike. Stunning HD quality sound is a hallmark of the 10S, and so is Senas Advanced Noise Control that ensures ambient noise doesnt interfere with incoming and outgoing audio. Bluetooth 4.1 technology, improved stereo Bluetooth speakers, and advanced architecture creates a smooth, crisp, and responsive user experience youll love. The Sena Smartphone App makes configuring your 10S a snap! Change settings, set groups of intercom friends, and access a Quick Guide. You can also set up your 10S to pair with up to two mobile phones for convenient hands-free calling. Features: Talk time: 12 hours Stand-by time: 10 days Operating temperature: -10C - 55C (14F - 131F) Dimensions: Main module: 85 mm x 57 mm x 27 mm (3.4 in x 2.2 in x 1.1 in) Speaker: driver unit 36 mm thickness 6.5 mm Boom microphone length: 183 mm Weight: Module: 57 g (2 oz) Bluetooth: Headset Profile (Hsp) Hands-Free Profile (Hfp) Advanced Audio Distribution Profile (A2Dp) Audio Video Remote Control Profile (Avrcp) Bluetooth 4.1 Intercom: Working distance: up to 1.6 km (1.0 miles) in open terrain Audio: Built-in SBC Codec Advanced Noise Control Wide volume control Sample rate: max. 48 kHz (Dac) Earbud port built into each clamp unit FM Radio: Built-in FM radio with RDS AF (Radio Data System Alternate Frequencies) Radio region: worldwide Radio frequency specifications: 76 - 108MHz 10 preset station memory with automatic scan function Battery: Charging time: 3 hours Type: Lithium polymer Includes: 10S headset main unit Clamp unit Speakers Wired boom microphone Boom microphone holder Microphone sponges Wired microphone USB power / data cable (micro Usb) Stereo audio cable, 2.5mm to 3.5mm straight Glued surface mounting adapter Foam speaker covers Speaker pads Hook and loop fasteners for speakers and microphone(s) Allen wrench Certificates: CE, Fcc, IC 10S-01D