... : MP3 etc;5.Signal to noise ratio: 95.5Db;6.USB version: USB2.0;7.Continuous working hours: about 8 hours ... ;11.Storage Temperature: -20 ° C-80 ° C;12.Product accessories: USB cable.Function Introduction1.This product is suitable for sports, leisure ... , new, unique, fun, high-fidelity sound !3.Stylish and cool wireless neckband, sporty appearance, so that you enjoy joy and comfort ...