Features:
-Large dynamic coil, double vibrating tympanic membrane, long battery life.
-9D Stereo Sound. The integrated cavity design creates a full range of surging sound effects.
-The signal transmission is stable, and the headset can be automatically' connected and paired after opening the cover and taking out the headset.
-The powerful compatibility of bluetooth 5.0 chip enables intelligent connected devices to connect most bluetooth devices in the market.
-Noise Reduction Technology makes your voice coherent for crystal-clear calls – even in noisy environments such as in an office, café or on a bus, train, car, etc.

Specifications:
Item name: Wireless bluetooth 5.0 Earphones
Brand: Lenovo
Model: HT38
bluetooth Version: 5.0
Driver Diameter: 10mm
Resistance: 20Ω
Frequency Response Range: 10 - 2000Hz
Total Harmonic Distortion: 0.1%
Impedance Range: up to 32 Ω
Sensitivity: 9dB 
Material: ABS
Color: Black/white
Size: 50 x 50 x 21mm
Charging bay capacity: 250mAh
Headphone capacity: 30mAh

Package includes: 
1 * Earphones 
1 * Charging case 
1 * Charging cable
1 * User Manual