ITEM NAME:10PCS TCRT5000L TCRT5000 Reflective Optical Sensor Infrared IR Switch infra D6E8 10PCS TCRT5000L TCRT5000 Reflective Optical Sensor Infrared IR Switch infra D6E8 100% brand new and high qualityCompact construction, sense the presence of an object by using the reflective IR beam from the object Consists of a phototransistor Snap-in construction for PCB mounting Plastic polycarbonate housing construction which prevents crosstalk Position sensor for shaft encoder Detection of reflective materials such as paper, IBM cards, magnetic tapes, etc. Limit switch foe mechanical motions in VCR General purpose- wherever the space is limited Size: Approx. 2.1 x 1.0cm/0.83";x0.39"; Quantity: 10 pcs Package includes:10 x TCRT5000L TCRT5000 Reflective Optical Sensor Infrared IR Switch infrared Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.