Descripción del producto

*first adjust well the shrapnel according to positive and negative plate of battery,putting into the battery and make battery pole slice get in touch with the shrapnel,then press the "test" ,if con light turn bright,the pole is right,if not,press the "switch" to change the polarity then press "test" until the light turn on. Electricity reference: Input voltage: AC**0V-AC**0V *0Hz**0Hz Electrification limited voltage: DC4.*5V*0.*5V Electrification current: **0mA**0mA