Wireless Bluetooth 4.1 Headphone, Stereo Ear-Hanging HD Stereo Headphone, Built-in Mic Sports EarphoneThe pair of Bluetooth headset delivers high performance and remarkable sound for your cell phone. It allows you to have clear sound transmission without ambient noise and to keep incoming communication private. You can use it to answer the phone, chat with your friends. Plug in this pair of headsets to enjoy exceptional on-the-go audio with your phone tucked away in your pocket, purse or backpack.Specifications Material: ABS. Size: 5.3 cm * 1.5 cm * 0.8 cm/2.09 inch * 2.09 inch * 0.05 inch. Version: 4.1. Frequency: 2.4G. Transmission distance: 10m/32.81ft. Frequency range: 20HZ-20KHZ. Function: Support Chinese and English language conversion, music playback, calls, hang up the phone, reject calls, last code redial, etc. Language: Chinese, English (under power-on condition, press "+" and "-" simultaneously for 1.5 seconds to switch). Wearing style: Ear-hanging. Power supply mode: Built-in lithium battery. Charging method: USB micro charging. Talking Time: 3-5 hours. Standby Time: 100 hours. Charging duration: 1-2 Hours.Notes 1.Please understand there may be mild deviation exist. 2.Due to the lighting and monitors, there are slight difference between the picture and the realitem.Package Content 1 * Bluetooth earphone. 1 * USB cable.Promise If the product has any quality problems, please feel free to contact us, we will help you solve the problem as quickly as possible.