Harry Potter Kids Wireless Headphones Navy

Speaker dimension: 40 mmImpedance (speaker): 32 ?±15% At 1KHZSensitivity: 95dB±3dB at 1KHz BT version: V5.0+EDR IC solution: BKRechargeable Battery: 500mAH, Lithium polymer battery Working time: 30 hours at 80% volumeOperation Distance: 10 me