The K Tool International XD6301 Rechargeable UV Leak Detection Pen Light is used to aid leak detection by using its high intensity ultraviolet light to detect fluorescent dye in Motor Oil, Transmission Fluid, power steering and Air Conditioning Systems to name a few. Our KTI-XD6301 features and durable steel pocket clip and can easily be charged using the built-in micro USB port. The XD6301 uses a rechargeable 350MAH lithium-ion battery that fully charges in 45 minutes and provides a 50-minute run time, the on board battery charging status indicator takes the guess work out of determining when the charging cycle is complete. At only 4” long the K Tool International XD6301 is the perfect size to fit in every AC technician's shirt pocket while the pocket clip keeps it secure. The KTIXD6301 is fully backed by our K Tool International 1 Year Warranty for added peace of mind.