Ulta Lit Light Keeper PRO 01201 The Complete Tool for Fixing Miniature Light Sets Nullify Imported All-in-One Multi Function Light Tester; Features make it easier to fix mini lights sets Features include Quick Fix Trigger, LED Head Light, Audible Continuity Detector, 3-way bulb puller, bulb and fuse tester, a storage compartment and 3 1.5-Volt batteries are included Simply plug. Click. Fix; Fixes most light sets in seconds by addressing the damaged bulb at the plug or at the bulb socket Defective bulb shunts cause most light set failures The Light keeper Pro is intended for the repair of Holiday Miniature Light based sets only; Check Light Manufacturer's instructions before use