The Streamlight Contoured Remote Switch replaces the standard battery door found on the TLR-1 and TLR-2 series weapon lights. This unique remote switch follows the contours of the handgun's trigger guard"" placing the switch directly under the middle finger for instinctive activation of the light that doesn't require the trigger finger or thumb. For constant on"" the standard rocker switch has been retained allowing for support hand momentary or locked-on operation.