TRUVI wireless headphones are compact in-ear headphones packed in a handy case that also functions as an battery, that allows to recharge the headhones. The LED display shows the current state of charge of both the batteries in the case as well as each earpiece. Touch control of the headphones ensures comfort of use. The headphones have a built-in microphone, which allows to make phonecalls. It is also possible to use one earpiece can be used. Specifications: Bluetooth version: V5.1, Bluetooth frequency: 2.4 - 2.48 GHz, Bluetooth range: up to 10m, battery capacity in each earpiece: 30 mAh, battery capacity in the case: 300 mAh, working time up to 3 hours, standby time: 300 hours