ITEM NAME:Light Sensor Module Optical Light Sensitive Sensor H6D6 Light Sensor Module Optical Light Sensitive Sensor H6D6 Main chip: LM393, photoresistor Operating Voltage: DC 3V ~ 5V Single way output stating Low-level output for an effective signal Compact light sensor module with onboard photo resistance, with three pins for 5V power supply, electrical TTL level (or SCM) and GND are power. This light sensor module comes with an indicator of output and the sensitivity is adjustable. Perfect for lighting control applications. Total size: approx. 65 x 11 x 13 mm package: 1 x light sensor 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..Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.