Check the listing for details. Wicked Lights Coil Cord Intensity Control Rheostat Tail Cap. Condition: New. Listed at 44.95 USD. Wicked Lights Intensity Control Coil Cord Tail Cap with Rheostat Control. Features a heavy duty "plug in and screw in style" coiled cord tail cap with coil cord intensity control rheostatIncludes elastic band with velcro pad for attaching coiled cord switch to weaponFor use with Wicked Lights Intensity Control Models (W403iC, A67iC, A67iR, A51iR, A55iC & A48iC lights ONLY). Will not operate any other model.The W402ZF can be upgraded and adapted for use with the intensity control tail cap if used with the Intensity Control LED and operated with 1 battery ONLY. Intensity Control LED's can be purchased separate.Please note: Tail cap is designed for use with W403iC, A67iC, A67iR, A51iR, A55iC and A48iC Ambush light ONLY. It will not work with any other brand or model light.