Topland Bluetooth Earphone Receiver AUBLREWT-7222 Continuous Talk Time: 13 hours Standby Time: 120 hours Communication Distance: 10m Bluetooth Ver. 4.1 Continuous use time is 13 hours. The main unit can be charged with the same micro USB cable as a smartphone. Volume, track forward, track back, play, and stop operations are possible from this device. It also has a microphone for calls, so you can make calls even with the main unit stored away. - Model Name: AUBLERW-T7222 - Bluetooth Version: 4.1 - Size: Width 65 x Height 30 x Depth 22mm - Continuous Talk Time: 13 hours - Function: Includes a call microphone function Although it is new and unopened, it has been stored at home. Please note that this is a used item, so please refrain from purchasing if you are sensitive to imperfections or are seeking a perfect item. Any noticeable damage is noted, but please check the images for confirmation.