Replacement of Photoresistor (CdS); Control of backlight brightness for LCD Monitors,TV sets, PDA ,Cameras and Mobile Phones; Switch for lighting equipments and Toys; FEATURES: Linear output conforming to illuminance; Built-in optical filter for spectral response similar to that of the human eye; High Gain Photocurrent Amplifiers IC; Temperature Stable; Low dark current and Low working Lux; RoHS Compliant / Pb-free / Cd-free. Packing and Precaution: 1. This product is packed with the environmental protection material, 100pcs per small package, 1000pcs per big package. 2. Avoid high temperature and humidity for storing.