ACESCREEN TwsL21 Mini Wireless Bluetooth Headset / Earphone Bluetooth Headset Bluetooth  (Black, True Wireless)

Wireless Bluetooth V5.0, clear and smooth music, stable signal. The transmission frequency is 2.4GHz, the sound is smooth, the treble is clear, and the bass is strong. With a transmission distance of 10 meters, you can enjoy music and calls anytime, anywhere without wire binding. Compact and lightweight can transmit high-quality sound, the line will not tangles. Battery display, so you can know exactly how much battery is left. You can charge your cell phone and other electronic devices in a charging bin. Suitable for your driving, cycling, work. In single charge earbuds will run Up to 4-5 Hours it will depends on customer usage. there is no specific hours mentioned for earbuds and power case backup. it depends on usage