color：black、white
QTY：100pcs
Wireless standard: 5.4V.
Battery capacity: 300mAh.
Earphone: 30mAh
Frequency: 50-10KHZ
Signal noise :>85dB.
Accessible distance: 10 meters.
Speaker size: 10mm.
Impedance: 32Ω+10%.
Sensitivity: 95±3DB
Power: Maximum 5MW.
Material: ABS plastic
Usage time: 6 hours.