Guide rail type - small size, standard modular structure, guide rail installation, easy installation Real-time monitoring - real-time monitoring of DC overvoltage and undervoltage faults, quick response, high stability Simple - no additional auxiliary power supply required, 2 sets of normally open and normally closed contacts Features - overvoltage and undervoltage values can be adjusted, overvoltage regulation The undervoltage protector is equipped with 2 indicator lights to indicate various working states, easy to use Note: due to different factory batches, the label words are different and not affect the use. Contact capacity: 6A 250VAC (resistivity) Installation: 35mm guide rail Overvoltage adjustment range:+8%-+42% Undervoltage adjustment range:-17%-+17% Action delay range:0.1-15s Protection function:overvoltage, undervoltage Colour:As Shown Material:ABS Package Contents: 1 * DC over-voltage and under-voltage protector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.