【Bluetooth 5.2】: Bluetooth V5.2, Effective Distance 20m, compatible with all Bluetooth-enabled smart devices,Strong signal connection. 【Handsfree】The phone automatically answers after 3 rings to allow you to speak with your friends or business partners freely | 【Long Play Time】A built-in rechargeable Li-ion battery supports 50 hours of continuous talk and play time and 500 hours standby time. Convenient for motorcycle driving, takeout, express delivery, outdoor sports, snowboarding, skating, etc. | 【Louder Volume & Noise Reduction】: Engineer replaced a better quality speaker。By using windproof and noise cancelling technology, this helmet headset transfers clear and high-quality stereo music sound. Solves the sound problem of high-speed driving | 【Waterproof 】No disturb Dustproof and IPX7 Waterproof by using Nano coating technology. No matter if you ride through the rain or on dusty streets, the headset is protected. | 【Support one-for-two and Battery Display】: New version of the helmet headset can connect two mobile phones at the same time, and the battery power can be displayed on the mobile phone screen. Guarantees 12 months of after-sales service【Easy to Install】Designed with detachable velcro, one can easily install the headset into the helmet.