The HJC Smart 50 Bluetooth Communication Device is the pinnacle in motorcycle intercoms. Being suited for certain HJC helmets, this device is designed to sit snug in slots on the helmet, reducing drag and weight on the side of the helmet.Suitable for HJC RPHA 2nd gen series: RPHA 31 / RPHA 71 / RPHA 91 and HJC i71 helmets.Featured High Definition speakers and dual sided controllers.Music sharing with other users.Intercom range of 1,600m (1.6km).Features bluetooth 5.0 for easier connection to a variety of devices.Mulit-language voice commands give access to their digital assistant.The HJC Smart 50B Bluetooth Communication Device features a very solid battery that has up to 13 hours of use time. With 2 control units, it allows for easy powering on/off, call answering, hang up, volume control, radio connect (FM), intercom pairing and voice commands. Each kit includes 2 sets of mics to best suit your helmet, a boom-type mic for modular and JET helmets and a wire type applicable for full fa