3 Review(s)

This kit suitable for 9V 12V battery, when the battery voltage is normal, it will not alarm. when the battery is over-discharge (less than 10.4V (12V battery) or 8V (9V battery) )so, the board will automatically alarm , the red light is on and the buzzer is called, to achieve sound and light alarm, enabling master battery discharge status, prevent over-discharge the battery, damage the battery.