The Streamlight Stylus Pro USB UV is a compact penlight that provides ultraviolet light for detecting engine or HVAC leaks among other uses. The 6.15", 1.9-oz USB rechargeable penlight's ultraviolet LED has a run-time of 2.5 hours. A purple, water-resistant sliding metal sleeve protects the USB port. The abrasion-resistant device features aluminum housing and a tail cap switch for momentary or constant operation. The Li-ion cell pack is rechargeable up to 300 times and is ready to use after 2.5 hours of charging. An optional AC wall adapter also is available. The light is IPX4-rated for water resistance, impact-resistant to 1m, and it comes packaged with a removable pocket clip and holster.