【Perfect Sound Quality】APTX LL & DSP noise reduction technology allows you to enjoy clear sound. DSP echo cancellation and noise suppression technology ensure high-speed and clear voice quality. Enjoy the beautiful scenery and high-quality music during the ride. | 【Long Working Time】Built-in rechargeable 850mAH lithium-ion battery, the device has a long standby and working time, the standby time is up to 180 hours, and the working time is up to 30 hours after being fully charged. The battery level display of the Bluetooth headset can be checked on the mobile phone, which is clear at a glance! | 【IP67 Waterproof】With nano-coating technology, dustproof and waterproof, it can safely protect the earphones outdoors. Don't even worry about rain or snow. This helmet headset will be a good choice for outdoor riding this season. | 【Connection Distance】20 meters Bluetooth transmission distance, stable sound quality. There is also a mobile phone battery display, which can be used to observe the battery power of the motorcycle Bluetooth headset in real time. | 【Suitable for All Ear Covered Helmets】The speaker thickness of this motorcycle Bluetooth headset is about 10mm. It is recommended to check whether your motorcycle helmet has a groove of about 10mm before buying, so as not to cause unnecessary trouble. Any questions please feel free to contact us.