Features: Bluetooth 5.0 master control chip, support handsfree date connection in 10m. Can talk, listening to music. Built-in DSP audio processing system, can be a very good eliminate Noise and echo, to ensure clear communication, and music. Super Mini design earphone hidden in the ear, Small and light, stealth design. Standby Time: about 100-150 hours Spescifications: Headphone Type: Both left and right ears can be used Bluetooth Version:V5.0 + EDR Bluetooth Profiles: Hands free/Headset Supporting Agreement: HEP/HSP/A2D/AVRCP Transmission Range: more than 10 meters Battery Type: 55mA rechargeable lithium battery Charging Time: about 1h-2h Working Time: Music 4-6 hours (The Volume will affect the time) Standby Time: about 100-150 hours Frequency Range: 2.40-2.48GHz Distortion factor: ≤1% Frequency Response: 20Hz-20KHz Wearing Styles: in-Ear/stealth headphones Package List: 1 x Mini Bluetooth Earphone 1 x USB Charging Cable 1 x User Manual