KE-31 Over-Ear RGB Light Bluetooth Headset Features: 1. Bluetooth 5.3 connection: simple pairing and stable connection. Let your kids enjoy wireless music without worrying about tangled cables. 2. Wireless hands-free calling: When the headset is on, having your kids on your phone is also an ideal online learning tool. 3. Rechargeable: Built-in 400mAh lithium battery, charging takes about 3 hours, can play continuously for 8-20 hours, and has a long use time. 4. Independent buttons: Multi-button design, you can easily switch music, adjust volume, freely control playpause, etc. 5. Lightweight and comfortable: Made of soft material, comfortable to wear, and will not press against the ears for long-term use. 6. Foldable design: Portable and foldable headband, compact design, more convenient to carry when traveling. Specifications: 1. Bluetooth version: V5.3 Jerry 2. Transmission distance: 15m 3. Output power: 10mW 4. Impedance: 32 ohms 5. Speaker diameter: 40MM 6. Frequency response: 20Hz-20KHz 7. Sensitivity:115+-3dB 8. Battery capacity: 400mAh 9. Charging time: 2 hours 10. Standby time: 120 hours 11. Available time with the light on: 8 hours 12. Available time with lights off: 16 hours 13. Product material: high toughness AB head bow + light silicone pad + highly flexible PU earmuffs 14. Product weight: 250g Package list: Bluetooth headset x 1 Charging cable x 1 Chinese and English manual x 1