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Bluetooth 4.1 Bluetooth 4.0 to Bluetooth 4.1 is based on firmware upgrade not hardware and universal intercom keeps you in touch up to 2.0 km 1.2 miles Crystal-clear HD audio with Sena’s Advanced Noise Control to block ambient noise Audio Multitasking technology allows you to have an intercom conversation while simultaneously listening to music FM radio or GPS Motion sensor technology lets you pair Bluetooth devices with a shake of the 20S Intuitive control with hands-free voice commands Bluetooth 4.1 And universal intercom Crystal-Clear HD audio and advanced noise control Choose what you want to hear with audio multitasking New user interface: motion sensor and voice commands Stay connected and in control with the Sena 20s app