Features:1. Integrated BT 5.1 chip, offers fast speed, stable connection, allows transmission of 10 m without obstacle.Effectively block external noise, and real-time audio calibration can maintain a high-quality listening experience.2. Compatible with mainstream devices with BT function, suitable for multi-platform, multi-system, and major brand mobile phones.3.The 2000mha large-capacity charging box can not only charge headphones, but also act as a mobile charging source for emergency charging of electronic products.4. The in-ear headphones are ergonomically designed to fit each ear perfectly. Perfect for exercise, running, sports and games.5. LED digital display shows the remaining battery power of the cordless headset clearly, then you have the charge status of your device at all times.Notice:Actual color may be slightly different from the image due to different monitor and light effect.Please allow 1-3cm deviation due to manual measurement.Description:Color/Style: As the picture shownBT version: V5.1Noise reduction version: CVC8.0Working distance: connect within 10 metersSingle earphone capacity: 50mAhCharging case capacity: 2000mAhBattery life: about 220 hours in total (with the charging box)Talk time: about 180 hours (with charging box)Headphone charging: about 40 timesCharging box input current: 5V1AControl method: touch controlProduct size: 7.7*5.2*3.4cmincludes:1 pair of Earphone3 pairs of Ear Tip1 x Charging Cable1 x Manual