Step Down Module DC DC Adjustable Current Voltage Double LCD Display Electrical Equipment Item Type: Step Down Module Model: WD3610 Working Temperature:-20℃~+75℃ (Pay attention to power tube temperature when using. exceeds please enhance heat dissipation) Accuracy: 0.01V, 0.01A, 3-digit Display, current unit is A Conversion Efficiency: up to 95% Short Circuit Protection: Yes (In constant current state. It is the value of constant current setting at present) Input Reverse Polarity Protection: Yes Anti-reflux Output: No (Please add a diode for charging!) Installation: up and down both sides of the acrylic sheet, 8pcs standoffs, 8pcs 3mmn screws. Connection: connection terminal or solder tenninal, "IN" is input, "OUT" is output. Module Size: Approx. 80 x 53 x 35mm / 3.1 x 2.1 x 1.4in Calibration: This module has calibration function. don't worry about the problem of inaccurate measurements. If you found inaccurate measurement, can use the following method of calibration. Just for the first time using a calibrated once! Special Instruction: Setting Instruction: Setting key to set the display mode, it have three types: Instructions: Press the "SET" button to cycle through the three display modes, the corresponding indicator will be on or off, then press the "ENT" button to save and exit. if separate press "ENT" button to switch backlit LCD screen.