Fangrui Product Details Features 1using Bluetooth 5.0 Technology To Provide Stable Transmission Coverage, Wider, Faster Speed, And Lower Power Consumption. 2the Twohands Handsfree Function Can Truly Release Your Hands And Make Riding Safer. 3builtin Largecapacity Rechargeable Lithiumion Battery, Long Standby Time And Long Working Time. 4the Waterproof Motorcycle Bluetooth Headset Is Suitable For Various Helmets, Which Is Convenient And Practical. 5adopting Intelligent Noise Reduction Technology And Highquality Antiinterference Microphone To Present Highdefinition Stereo Effect And Onekey Clear Call. Specification Item Type: Motorcycle Helmet Headphone Material: Abs Bluetooth Version: 5.0 Headphone Battery: Lithium Battery 250mah (battery Included) Bluetooth Range: Approx. 15m / 49.2ft Microphone Transmission Distance: Approx. 1m / 3.3ft Frequency: 2.402-2.480ghz Speaker Unit: Approx. 30mm / 1.2in Maximum Volume: 112db: -85db Standby Time: About 700 Hours Working Time: About 16 Hours Charging Time: About 2 Hours Applicable To: Various Types Of Helmets Package List 1 X Wireless Helmet Headset 1 X Micro-usb Charging Cable 1 X Manual 4 X Hook And Loop Fastener 3 X Sponge Cover