Recommend to connect hifi lossless music player,
Don`t recommend to connect mobile phone.
Distortion rate: 0.003%
Output Power: 70MW*2
Standby Time: 300 hours
Playing Time: 48 hours
red light: charging
green light: finished charge
Fit 16-200 Ohm headphone(earphone)
Battery: Built-in Lithium Battery
Power filter: SANYO solid state electrolyte
Advantage: this hifi headphone amplifier support MP3,digital music player,computer,car mp3 player,you will get
the excellent sound quality,if you open the bass button,you will get the shock bass.
Disadvantages: mobile phone signal interference will produce low noise if you use it to connect mobile phone,
other products without interference.