First-ever motorcycle communication system especially designed for and recommended by HJC helmets. With DMC technology on board, full 4-way intercom conversations are seamless and the group remains constantly connected at an astounding range of up to 3.6 km. Listen to your favorite music from an MP3 player or integrated FM radio, talk with friends over the phone, or keep updated with helpful GPS instructions. Everything will sound crystal clear with the new 40 mm thin HD speakers which can also easily be substituted with a pair of your choice. With safety in mind, operate the SMARTH virtually hands-free with voice commands. On-the-go configuration and control of this device via Cardo SmartSet App. Optimal operating range of -20°C to 55°C.