Fashionable design, let music surround your life at any time. Hands-free function, really free your hands. Built-in rechargeable lithium-ion battery, long standby and working time. Support mobile phone power display, convenient to know when to charge. New waterproof structure design, support for Siri intelligent voice control function for iphone4 and above mobile phones, support for android intelligent voice control function, convenient, fast and intelligent. Specifications Bluetooth version: Bluetooth 5.3 Frequency: 2.402GGHz-2.480GHz Range: 20-30 meters (depending on the device) Microphone transmission distance: no more than 1 meter. Li-ion battery: 3.7v/1500mA Play time: up to 60 hours Charging voltage: 5V Standby time: up to 240 hours. Adopting the latest Bluetooth 5.3 technology, superior signal transmission, ultra-low power consumption, all Bluetooth devices, automatic answering function, can switch manual answering function, safe and fast, built-in high-quality anti-interference Microphone, can effectively realize hands-free answering and hanging up calls. High-fidelity sound quality, support previous or next song function, volume addition and subtraction, play pause, automatic call back and other functions, easy to operate. Colour:black Material:ABS Accessory styles and random colors, don't accept the specified color The actual product may have slight color difference or difference, which will not affect the use Package Contents: 1 set * Motorcycle Helmet Headphones (Hard Mark) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.