Product type: full metal karaoke microphone 
Microphone: capacitance 
Output power: 10mW (headphone output) 3W (speaker output)*2  
Frequency range: 100Hz-10KHz 
Maximum sound pressure level: 1KHz THD< >115db 1% 
Reverberation mode: echo effect reverberation  
Power supply: built in polymer lithium battery 
Battery capacity:2MaH 
Charging power supply: DC5V