Frequency: 50-60Hz Use: open during the day or night, during the day and switch off the evening off, without manual operation With design, installation, reliable, small size, light weight, easy installation, advantages. Widely used in street lighting, highways, factories, gardens, ports, airports, farms, parks, schools and other places. Package Contents: 10 x Photocell Street Light Photoswitch Sensor Auto On Off Switch Only the above package content, other products are not included. Note: Light 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.