KE-30 RGB Head Mounted Wireless Bluetooth Headset Features: 1. Bluetooth 5.3: Simple pairing and stable connection. Let your kids enjoy wireless music without worrying about tangled cables. 2. Use the included audio cable to connect the headphones to your device, you can still enjoy music, after plugging in the audio cable, the Bluetooth mode will be turned off. 3. Wireless hands-free calling: When the headset is on, having your kids on your phone is also an ideal online learning tool. 4. Built-in 400mAh lithium battery: charging for about 3 hours can support about 8-20 hours of continuous playback. If the battery in Bluetooth mode is low, you can use the auxiliary cable to enjoy wired mode. 5. Independent buttons: Multi-button design allows you to easily switch music, adjust volume, and freely control playback or pause. 6. Adjustable headband: It adopts soft cushions and pressure-relieving ear pads, suitable for people of different ages. 7. Lightweight and comfortable: Even if the child wears it for a long time, he will not feel pressure. 8. Foldable design, easy to carry. Specifications: 1. Product material: high toughness AB head bow + light silicone pad + highly flexible PU earmuffs 2. Bluetooth version: V5.3 Jerry 3. Transmission distance: 15m 4. Output power: 10mW 5. Impedance: 32 ohms 6. Speaker diameter: 40MM 7. Frequency response: 20Hz-20kHz 8. Sensitivity: 115+-3dB 9. Battery capacity: 400mAh 10. Charging time: 2 hours 11. Standby time: 120 hours 12. Available time with lights on: 8 hours 13. Available time with lights off: 16 hours Packaging list: - Bluetooth headset x 1 - Charging cable x 1 - Chinese and English manual x 1