Smart Duo is the ideal solution for those who often travel with a passenger. Whether you re going to work or enjoying a weekend ride. Smart Duo offers two independent devices, each of which can be connected to each passenger s phones or Bluetooth audio devices, while also being linked together in intercom mode. Both devices are universal. Very easy to pair. Both to the telephone & to each other. You do not need any accessories to mount the device in your helmet. Features HF 3.0 Intercom + HF 2.0 Dual Enjoy your music in stereo with 2 speakers. Answer your calls with the Voice Answer function. Listen & follow the instructions of your smartphone navigator. Talk to your passenger with other Twiins. 100% compatible with all Bluetooth mobile phones & smartphones. Intuitive: only one control button integrated in the microphone. Bluetooth V.3.0. HQ sound & noise reduction technology. HF 3.0 Intercom is 100% compatible with all Bluetooth mobile phones, smartphones & audio devices. Very easy to install, no tools are required.