20S-01D SENA DUAL Bluetooth 4.1 Communication DUAL System for Motorcycles, 20S-01D. The Sena 20S Motorcycle Bluetooth Communication System helps you enjoy your ride to the fullest by keeping you in touch with up to eight of your buddies in crystal-clear HD audio, up to 2.0 km (1.2 miles) away, through the Group Intercom feature. Sena’s 20S is the ideal universal Bluetooth headset for your motorcycle helmet, which uses the Universal Intercom protocol so it can be used with all Sena and non-Sena Bluetooth headsets on the market. The 20S delivers HD-quality audio that’s clear, precise, and comfortable in every condition. Sena’s Advanced Noise Control ensures ambient noise doesn’t interfere with incoming and outgoing audio. Bluetooth 4.1 technology, high-quality stereo Bluetooth speakers, and dual-module architecture create a smooth, crisp, and responsive user experience you’ll quickly appreciate. Sena 20S Audio Multitasking technology allows you to have an intercom conversation while simultaneously listening to music, FM radio, or GPS. No longer do users have to deal with the frustrations of interruption-based audio functions of past Bluetooth communication devices, the 20S’ universal intercom is the perfect solution. Now audio features won’t interrupt each other but simply overlay for a smooth listening experience. Enrich your ride with interweaving audio sources. The new user interface makes setting up and pairing your 20S incredibly easy, thanks to Sena’s motion sensor technology. Pair your Bluetooth devices with a simple shake of the 20S. Once you’re on the road, complete control of the 20S can be done through hands-free voice commands. Intuitive technology ensures safe, controlled riding as you seamlessly move through music, phone, and intercom features. The optional Handlebar Remote control gives you even more command-and-control flexibility. The 20S also offers the ability to pair with up to two mobile phones for convenient hands-free calling.