This Handheld Digital Light Level Meter Has A Built-In Silicon Photo-Diode Light Sensor With Spectral Response Filter (With Cap). It Has Been Designed For The Measurement Of Light And Temperature. It Provides Rapid Accurate Readings Displayed On An Easy-To-Read Backlit Lcd Dual Display. The Device Features Data Hold Min/Max And Auto Power Off. The Ergonomic Design Is Highly Portable And Pocket-Sized. There Is A Low Battery Indicator. Requires 3X Aaa Batteries.PTDDRPDIR12443