All LS2 motorcycle helmets that support Bluetooth are compatible with the Linkin Ride Pal III Bluetooth kit. You can be sure that you will be heard and have 100% sound clarity at all times during your ride thanks to technology created in collaboration with tech giants Sena. Bluetooth enables hands-free calling from Bluetooth mobile phones as well as stereo music and voice GPS navigation instructions. At high speeds (+150 km/h), cutting-edge digital signal processing technology ensures crystal-clear sound quality. While riding, wind noise and other ambient noise are effectively reduced by a DPS advanced noise suppression system. Motorcycle Helmet Bluetooth Kit Features: Bluetooth Connection: 1 or 2 Cell phones. GPS. Bluetooth MP3 player. Bluetooth Intercom: Driver to passenger communication. Four-way conference communication from motorcycle to motorcycle. Four-way universal intercom. Other Features: Bluetooth stereo music by A2DP. Crystal clear natural sound quality. Simultaneous connection of two mobile phones at the same time. DPS system for ambient noise suppression. Switch-on with Voice control. Bluetooth music control by AVRCP: Volume, Play, Pause, Next and Previous track. Easy operation by only three buttons. VOX function - microphone turns off when you don´t talk. Individual volume control for each audio source. Can communicate with all LINKIN Ride Pal headsets and with all Sena and non-Sena Bluetooth headsets. Up to 7 hours talk time, 7 days stand-by time. Can be used while charging on road trips. Water resistant for use in all weather conditions. Suitable for all LS2 helmets and most non-LS2 helmets. Firmware upgradeable via PC. Specifications: Bluetooth: headset profile (HSP) hands-free profile (HFP) extended audio output profile (A2DP) profile for remote control of audio or video devices (AVRCP) Bluetooth 3.0 Intercom: up to 900 meters range in open terrain universally suitable for all LS2 helmets (fits also for the FF399) Audio: advanced Noise Control wind noise reduction integrated SBC codec big volume control sample rate: 48 kHz (DAC) Battery pack: charging time: 2.5 hours type: lithium polymer Contents: 1 x Sena LS2 headset unit 1 pair of microphone attachments 1 pair of velcro straps for attaching the speakers 1 x USB charging and data cable