AS-220 type electric lamp automatic switch is based on a novel photoelectric switch photoelectric semiconductor element to design characteristics. It is mainly composed of a photo resistor sealed by CDs and integrated circuit. Features: This Light Switch enables you to turn on or off the light in day and night without manual operation. Novel design, reliable and long service life. Widely used: street light, highway, factories, garden, ports, airports, farm, parks, schools, and other places. Also can fit into solar lamps and lanterns, or cars, motorcycles, electric cars and other power supply voltage is AC220V lamps and lanterns or equipment. It can install on the wood, metal and concrete pole. Automatic switch wire connection: white line and black line connect power, white line and red line connect load. Specification: Sensitivity: Not adjustable Input Voltage: AC 220V Max Load Current: 3A Output: Relay Frequency: 50-60Hz Delay Time: < 3 minutes Dimensions: 50 x 42 x 35 mm (except bracket) Package Include: 1 x AS-220 3A Photo Switch Sensor Dimmer Switch Auto On Off Photocell Street Light Control