About this item Using bluetooth 5.0 technology, you can keep connected with your mobile phone and enjoy music, and provide efficient and convenient communication during riding. bluetooth headsets can be paired within an effective distance of 20m‑30m, and the signal is strong. bluetooth headset has a built in rechargeable lithium battery for long standby time. Hands free for your powerful mobile phone, allowing you to concentrate on driving safely. The windproof and more stable connection method is adopted, with intelligent noise reduction technology, this helmet headset transmits clear, high quality stereo music in the loud sound, compatible with all smartphones with bluetooth function. It adopts detachable hook&loop design, which is easy to install in the helmet and is firmly fixed. Installation and disassembly are very simple, basically suitable for all types of motorcycle helmets The sound reminder function can easily set up the device according to the sound reminder, support the display of the battery on the mobile phone, and easily know when to charge.