1、The large‑capacity charging compartment can not only charge the headset, but also battery life for the mobile phone. 2、With power display, you can clearly judge the remaining power, and get rid of the trouble of sudden loss of power. 3、Using Bluetooth 1 high‑performance chip, intelligent automatic pairing, high Bluetooth transmission rate. 4、Reduce power consumption, sound quality is smoother, and signal is more stable. 5、Ergonomic design, better fit the ear canal, giving both ears a more comfortable and stable wearing experience. 6、Intelligent control, you can complete multiple functions with just one touch, prevent accidental touch, and make blind pressing easier. 2 x Bluetooth Headphone1 x Charge Box1 x USB-Micro Charging Cable4 x Earmuffs Item Type: Bluetooth HeadphoneMaterial: ABSColor: BlackBluetooth Version: Bluetooth V 5.1Bluetooth Protocol: Support L2CAP/A2DP 1.2 (AVCTP 1.3/AVDTP 1.2/AVRCP 1.3)Speaker Specifications: Φ8mm 32ΩFrequency Response: 20-20KHzSignal to Noise Ratio: 85dBDistortion: 1%Transmission Distance (Barrier-Free): 10mBattery Specifications:Headphone Battery: 3.7V/45mAhx2 with protection boardRechargeable Battery: 3.7V/1200mAh with protection boardThe number of times the headset is charged by the charging compartment: about 12 timesCharging Time: About 1.5 hours for earphones, about 2 hours for charging compartmentCharging Compartment Input Specifications: 5V---300mACharging Bin Output Specification: 5V---120mAPlaying Time: About 2 hoursStandby Time: About 50 hoursMicrophone Sensitivity: -42dB ±3dBApplication: Listen to music, call, clock display