Description: Bluetooth 5.0 master control chip, support handsfree date connection in 10m. Can talk, listening to music.Standby Time: about 100-150 hours. Safty battery protection to ensure working time to 5 hours. 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. The headset connect 2 bluetooth devices at the same time,for Calling, Music, Gaming Specification: 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: 50mA rechargeable lithium battery Charging Time: about 1.5h-2.5h Working Time: Music 4-6 hours (The Volume will affect the time) Standby Time: about 100-150 hours Frequency Range: 2.40-2.48G Distortion factor: ≤1% Frequency Response: 20Hz-20KHz Wearing Styles: in-Ear/stealth headphones Size Chart: 26.5x16mm/1.04x0.63inch Package Includes: 1 Piece Mini Bluetooth Earphone 1 Piece USB Charging Cable 1 Piece User Manual(4 Pack) Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!