Description: The 5V DIN Rail mount DC signal line surge protector with replaceable modules that are designed to protect sensitive telephone datacom and instrumentation equipment against harmful surges and electrical transients. RS-5V/12V/2S for RS485, RS422, audio, video, data bus and other signal ports. RS-5V/12V/24V/2S for RS485, RS422, RS232, 4-20mA, audio, sensor control, data bus, mobile communication and other signal ports. RS-110V/2S for signal ports such as telephone signal, public communication, etc. RS-130V/2S for signal ports such as broadcast signal and audio power amplifier, etc. Specification: Material: Plastic and Metal Size: 90x63x23mm Package Includes: 1 Piece Surge Protection Device Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia