• Rated impedance:4Ω                                              
• Output power 1W
• Frequency: 90Hz to 20kHz
• Supply voltage:  5V                                
* S/N:≥85dB
• Product size: 40 x 40 x 40mm
• Product weight: 0.07kg
* Li-battery rechargeable
Carton Size: mm (40sets/CTN)  N.W/G.W:KGS 20GP:SETS   40GP:SETS      40HQ:SETS