Upgraded system of the original SMH10 system. Bluetooth® specification v4.1. Bluetooth Intercom up to 1,6 km (1 mile) in open terrain. Ultra slim and light for sportbike helmets. Four-way conference intercom through One Touch Group Intercom™. Also uses the Universal Intercom™ to communicate with all Sena and non-Sena Bluetooth® headsets on the market. Simplifies connections for earbuds and microphone (wired or boom-type) by condensing them down to a single clamp connector, minimizing the number of wires and enhancing reliability. Easy operation by versatile Jog Dial makes it effortless to operate. Micro USB port for battery charging and future software updates. Bluetooth® music playback control: play, pause, track forward and track back. Remarkable battery life: talk time up to 12 hours; standby time up to 10 days; can be fully charged in as little as 3 hours. Advanced noise control for less road noise and clearer communication. Built-in FM radio tuner with a station scan and save function. Water-resistant for use in inclement weather. 10S Smartphone app makes configuration a snap – change settings, set groups of intercom friends and access a Quick Guide; pair up to two mobile phones for convenient hands-free calling. 10S Single Unit Kit includes the list shown; 10S Dual-Pack Kit includes two complete sets of the 10S Single Unit Kit in one box. 1- Bluetooth® main module. 1- Clamp unit. 1- Microphone cap. 2- Speakers. 1- Wired boom microphone. 1- Boom microphone holder. 2- Microphone sponges. 1- Wire microphone.