Working voltage: DC 12V/24V(6.5-25V) Working current: 8-20MA MODBUS RTU 03 06 control mode Input port voltage range: 5-30V Input port status supports query (default) and automatic reporting The default rate is 9600BPS, which can be configured to support 1200 2400 4800 19200 rate Input versions: high level input (green PCB) Size: 122 x 88 x 47mm(with Case) Weight: 200 grams(with Case) Application Automated industry input expansion board Digital in to RS485 ,Home Automation Identification system CCTV Camera PTZ Control Security system RS485 remote control Type: N4DIH32 Colour: Green Material: plastic Package Contents: 1 x Switch Acquisition Board Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.