The Tracerline VioMAX Plus, No. TP-8650ACS, is a telescopic, true UV leak detection lamp engineered for finding A/C and fluid leaks in tight, cramped areas inaccessible to larger lamps. Its super-bright 400 nm violet light LED offers optimal fluorescent response and contrast, and it works with both universal/ester and PAG A/C dyes, as well as most fluid dyes. It weighs 1.6 oz and measures just 9" in the closed position. It extends to 29" when open. Powered by three 1.5V batteries (which are included), the VioMAX Plus has an LED service life of 100,000 hours.