* Frequency: 80Hz-12KHz * Output power: 6W * Speaker impedance: 4Ω * Battery: 3.7V/1000mA Rechargeable lithium battery * Recharge time: 2-3Hours * Battery working time: 8----12Hours

1.Small size,external battery designed for easy replacement 2.By Nd-Fe-B Magnetic trumpet,instant response quickly,Noise reduction degree is higher 3.Multi-Using acoustic theory and technology of digital frequency shift, Available to meet outdoor and indoor needs