The XBi2-H has been designed to be incorporated into the HJC ISMAX BT helmet. The IS-MAX BT helmet has a built-in recess for installation of the new XBi2-H, so the unit fits nice and flush into the helmet for less wind resistance and ergonomic design. Despite being designed specifically for the HJC IS-MAX BT helmet, the XBi2-H is still compatible with the previous design: the XBi2; allowing you to still communicate with riders who own the previous XBi2 models. The XBi2-H has the same features as the XBi2. The module is still compatible with Bluetooth capable devices ( MP3 player, GPS, etc.), and is incorporated with the Lithium Polymer battery to give you up to 6-8 hours of talk time and one hour express charge. You can still communicate with up to three other riders up to 1,640 ft (500 meters). The XBi2-H Bluetooth has a waterproof casing and a noise suppression microphone with hi fidelity stereo speakers. Check out the Chatterbox XBi2-H Bluetooth Headset Communication System, Chatterbox communications systems, and other motorcycle communications device options on our website: CompetitionAccessories.com!