2Pcs 9V 12V Battery Anti-Over-Discharge Sound and Light Alarm Anti-Over-Discharge Protection Board Low-Voltage/Under-Voltage Protection Module

Advantages: With sound and light alarm, it is straightforward to see if there is any protection. The module input has reverse connection protection, and the input power polarity will not burn out if the polarity is reversed. But there is no overvoltage protection. If the input exceeds 15V, the chip on the module will burn out.

• Mainly used for battery (9V or 12V) voltage monitoring, simple and practical, with sound and light alarm prompts.
• When the battery is under-voltage, the buzzer sounds "didi" and the red LED indicator lights up. When the battery voltage rises above the set value, the buzzer stops alarming.
• 9V battery: When the battery is over-discharged (the battery voltage is lower than about 8V), the red indicator light is on and the buzzer sounds to realize the sound and light alarm, so as to realize the battery discharge status, so as to prevent the battery from over-discharge and damage the battery.
• 12V battery: When the battery is over-discharged (the battery voltage is lower than about 10.4V), the red indicator light is on and the buzzer sounds to realize the sound and light alarm, so as to realize the battery discharge status, so as to prevent the battery from over-discharge and damage the battery.
• Size: 29*30mm