The Tactical TP-RLB1-DPDT is a 12Vdc 'buffered' relay with a double pole double throw output (DPDT) and is ideal for any 12V equipment with limited sink current capability. The relay can be configured to trigger with either a negative or positive voltage and by default both poles of the relay are voltage dry contacts. A positive or negative voltage can be applied to the common of either poles by changing the onboard jumper.