Upgrade to August, 24, 2018, 2 0 4 DPDT signal relay module version. takamisawa ry24w-K High Quality Relay, Switch Contact Material - Gold Overlay Silver - Palladium Darlington transistor circuit drives a relay coil, LED indicator for each relay channel. High quality terminal base screws FR-4 fiberglass PCB with dual copper layer. Dimensions:L72 5mm x w80mm x H18 1mm Operating Voltage/Current (VCC):2VDC/80mAh to 16 8 31(at 24VDC) Control signal voltage (IN-X):0V - 0 5VDC(low level), non-working relay 2.5V - 24VDC (High Level), Relay Action Each switch output (relace switch) Contact rating: For AC, 120VAC / 0 5 Amps for DC, 24 VDC/1 0 Amp Paper Specifications, Please download the PDF data sheet before purchasing. https://IMAGE - NA. SSL-IMAGE - AMAZON COM / IMAGE / I / 91ml0tph-RL PDF