12V Battery Low Voltage Cut off Switch On Protection Undervoltage Controller DC _x000D_ _x000D_ _x000D_ _x000D_ 12V Under-Voltage Switch Controller Protect Battery from Over-discharging for Prolong Battery Life Durable Lightweight M4YD _x000D_ _x000D_ 12V Battery Low Voltage Cut off Automatic Switch On Protection Undervoltage Controller _x000D_ _x000D_ _x000D_ Features: _x000D_ _x000D_ This is a under-voltage switch controller used to turn off the power of load in the event of the voltage dropping below a set value. _x000D_ When the battery voltage increases to a set value, the module will automatically turn on load again. _x000D_ Designed with a LED indicator to show if battery is under-voltage. _x000D_ Both turn-off and turn-on voltage value can be adjusted by simply pressing buttons. _x000D_ This controller will help you to protect battery from over-discharging and prolong battery life. _x000D_ _x000D_ _x000D_ Specifications: _x000D_ _x000D_ Suitable Battery: 12V storage/lithium battery _x000D_ Control Current: 20A _x000D_ Control Precision: 0.1V _x000D_ Voltage Error: 0.1V _x000D_ Size: 8*4.3*2.8cm/3.1*1.7*1.1in _x000D_ Weight: 40g(approx.) _x000D_ _x000D_ Restore to Factory Setting: _x000D_ At normal state, press and hold S1 and S2 buttons together, till display shows 888, to restore to factory setting. _x000D_ _x000D_ _x000D_ Package Includes: _x000D_ _x000D_ 1 x Battery Under-voltage Controller _x000D_ _x000D_ _x000D_ _x000D_