Relay output (works as a switch for your charger or load). Dimensions: Approximately 66 x 46 x 16mm.
The relay on the board should be placed "in-line" with one of the wires (typically the positive) of your charger or load. Xh-m608 Manual
Understanding the limits of your hardware is critical for preventing electrical failure. DC 6V to 40V. Display & Control Accuracy: 0.1V. Relay output (works as a switch for your charger or load)
Sets the trigger for stopping a charge or starting a discharge. Xh-m608 Manual
Relay stays closed only when the voltage is between the lower (P1) and upper (P2) limits.