Green Luca headphones

Wreless over-ear stereo headset
• Wireless standard: 5.1V.
• Battery capacity: 150mAh.
• Frequency: 20Hz-20KHz.
• Signal noise :>85d8.
• Accessible distance: 10 meters.
• Speaker size: 40mm.
• impedance: 320.
• Sensitivily: 112+3DB.
• Power: 20MW,
• Material: ABS plastic
• Usage time: 4 hours.