Features:1. Integrated BT V5.1 chip, offers fast speed, stable connection, allows transmission of 10 m without obstacle.2. Compatible with mainstream devices with BT function, suitable for multi-platform, multi-system, and major brand mobile phones.3. Effectively block external noise, and real-time audio calibration can maintain a high-quality listening experience.4. The in-ear headphones are ergonomically designed to fit each ear perfectly. Perfect for exercise, running, sports and games.5. Built-in LED energy-saving lamp beads, can be used for long-term lighting, acting as a night light, small and easy to carry.6. The large-capacity charging box can not only charge headphones, but also act as a mobile charging source for emergency charging of electronic products.7. The battery 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:Bluetooth-Compatible Version: V5.1Scheme: Jerry 6983D4Transmission distance: 10 metersTalk time: 4 hoursMusic play time: 4 hoursHeadphone battery: 45mAhRechargeable box battery: 1200mAhSpeaker: 8mm copper ringCharing box size: 8*5cmEarbus size: 1.5*2.3*1cmLanyard length: 5.5cm Package List:1 pair of Earphone1 x Charging Box1 x Charging Cable