Description: Built-in rotatable shaft, easy to rotate 270°,Wear regardless of left or right,the comfortable angle can be adjusted arbitrarily according to your wearing habits,and not easy to fall Bluetooth 5.2 chip,brings efficient and convenient use, -low latency voice synchronization Dual noise reduction system,deep noise reduction, making calls as clear as face-to-face Waterproof and sweatproof,multi-process rigorous design, no fear of rain splashes and sweat,let you exercise without fear Custom composite diaphragm and large dynamic circle acoustic technology,restore the high frequency and brightness of music Specification: Item No.: Q20 Bluetooth version: version 5.2 Transmission range: about 10 meters Chip type: Jerry Display:digital display Channel: stereo Usage: hanging ear type Battery: 300MAH Life time: about 30 hours Charging time: about 2 hours Whether single or double ears: unilateral hands-free Universal for left and right ears, rotatable Battery type: lithium polymer battery Support protocol: HEP\HSP\A2D\AVRCP Process material: ABS,plating,silicone ear caps Frequency: 20Hz-20KHz Impedance: 32 ohms Sensitivity: 85dB/mW Waterproof rating: IPX 5 Headphone weight: 12.6G Material: Plastic Size Chart: 7.2x6x2.1cm/2.83x2.36x0.83inch Package Includes: 1 Piece Charging Cable 1 Piece Manual 2 Pieces Ear Caps 1 Piece Earphone 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!