Feature: 1. The LED display of automobile battery displays the voltage value in normal mode. 2. Press the button (beep) and the display will flash slowly from the steady light, then start the voltage setting mode. 3. The voltage number flickers slowly.Then press the button again to change this value, each time it is pressed it will increase by 0.5V (when it reaches the maximum, it will go to the minimum voltage and cycle). 4. Wait about 3 seconds without pressing, to exit the voltage setting mode, and save and save the voltage value. 5. When the voltage value is lower than the set low voltage value, the buzzer will start and continue, and the display will flash quickly to sound the alarm. Specification: Condition: 100% Brand New Item Type: RC Battery Low Voltage Alarm Material: Plastic Size: Approx. 40 x 33 x 25mm / 1.6 x 1.3 x 1in (without wires) Battery Support: 2-4S battery Power Interface: JST Type: RC accessories Quantity: 1 Suitable for 1:8/1:10 remote control vehicle (for SCX10/TRX4, etc.) 1. Normal mode The LED display of automobile battery displays the voltage value in normal mode. 2. Setting method of voltage alarm Press the button (beep) and the display will flash slowly from the steady light, then start the voltage setting mode.The voltage number flickers slowly.Then press the button again to change this value, each time it is pressed it will increase by 0.5V (when it reaches the maximum, it will go to the minimum voltage and cycle).Wait about 3 seconds without pressing, to exit the voltage setting mode, and save and save the voltage value. Note: The default voltage is 6.5V, and the changed voltage will be saved even if the power is turned off after setting.Set the voltage to 6-15V. 3. Alarm of low voltage value When the voltage value is lower than the set low voltage value, the buzzer will start and continue, and the display will flash quickly to sound the alarm. Note: When the alarm is started, you cannot cancel the alarm unless the power is turned on again and the alarm is not triggered.In the alert state, the Settings mode is still available, and the touch alert needs to be turned on again.. Package List: 1 x Low Voltage Alarm1 x Manual