Denshine FTLAB FUV-001 SmartLab Smart UV (Ultra Violet) Checker (Blue) It indicates UV index from UV radiation that is present in sunlight, and is produced by electric arcs and specialized lights such as mercury -vapor lamps, tanning lamps, and black lights, using semiconductor sensor. Detect and Counter "Ultraviolet(UV)" by Semiconductor sensor. Smartphone App "Smart UV Checker" in Android Play Store or Apple App Store. Real -time display of measurement results using "Smart UV Checker" App. Ultra Compact Design & Ultra Low Power. use 3.5 earphone jack of a smartphone.