KE-31 Over-Ear Bluetooth-compatible Headphones with RGB Lights Wired/Wireless Headset - Beige Bluetooth-compatible 5.3: Easy pairing,stable connection. Let your child enjoy wireless music without worrying about tangled cables Use the included audio cable to connect the headphones to your device,and you can still enjoy music even if the headphones are not charged. When the audio cable is inserted,the Bluetooth-compatible mode will be turned off Wireless Hands-Free Calls: When the headphones are on,they make an ideal online learning tool for your child on your phone Rechargeable - Built-in 400mAh: Support about a few hours of continuous playback. If the Bluetooth-compatible mode battery is low,you can use the auxiliary cable to enjoy the wired mode Independent Buttons: Multi-button design allows for easy music switching,volume adjustment,and complete control of play/pause Adjustable Headband: Soft padding and pressure-relieving ear cushions,suitable for people of different ages Lightweight and Comfortable: Even when worn for extended periods,children won't feel pressured Foldable and Portable Design: The foldable headband and compact design are perfect for your backpack Specifications: Bluetooth-compatible Version: JL V5.3 Transmission Distance: 15m Output Power: 10mW Impedance: 32Ω Speaker Diameter: 40mm Frequency Response: 20Hz-20kHz Sensitivity: 115±3dB Battery Capacity: 400mAh Charging Time: 2 hours Standby Time: 120 hours Duration with Lights: 8 hours Duration without Lights: 16 hours Package included: 1 x Bluetooth-compatible Headphones 1 x Charging Cable 1 x User Manual (English and Chinese) Other items not included