1、Detecting range: DC 0~10A; accuracy: 0.01A(10mA). 2、Detect the current to control the relay then control the circuit on/off. 3、Set delay time to prevent output shock so as to protect the circuit. 4、With error calibration function. 5、Can turn off the LED display to reduce power consumption. This module can detect DC current in the range of 0-10A, the accuracy is 0.01A. Features: Detecting range: DC 0~10A; accuracy: 0.01A(10mA). Detect the current to control the relay then control the circuit on/off. Set delay time to prevent output shock so as to protect the circuit. With error calibration function. Can turn off the LED display to reduce power consumption. Functions Description: P-1: Over-current Detection: when the detecting current<I1(low limit setting), the relay closes; >I2(high limit setting), the relay opens. P-2: Under-current Detection: when the detecting current>I2, the relay closes; <I1, the relay opens. P-3: Close in the Range: when the detecting current is between I1 and I2, the relay closes; relay opens in other situation. P-4: Open in the Range: when the detecting current is between I1 and I2, the relay opens; relay closes in other situation. P-5: Error Calibration and Delay Time Setting: the relay would not operate. Buttons Description: K1: Modes Selection; K2: "+" K3: "-" Long press K1 for 2s into modes selection; short press K1 to select function and K2 to enter the mode. Note: After power on, the LED digits would pulse if the detecting current terminal is none. Specifications: Voltage: DC 12V Detecting Range: DC 0~10A Accuracy: 0.01A(10mA) Standby Current: Approx. 20mA Display: LED Digital Display Item Size: 65 * 40 * 18mm Package Weight: 29g / 1.04oz Packing List: 1 * DC Current Detection Module 1 * DC Current Detection Module