Applications Twilight switch with external photosensor-Used for switching street illumination and garden lights, illumination of advertisements, shop windows, etc. Function Features -Serves to control lights on the basis of ambient light intensity. -Level of ambient intensity is monitored by an external sensor and output is switched according to set level on the device. -Control input for additional control - Illumination Rang 1-100Lx -Function ON-AUTO-PFF -Universal supply AC 110V- 240V. -Output 1SPST 16A/AC1 - Suply indicated by GREEN LED, Relay status is indicated by RED LED. -1 MODULE, DIN rail mounting. Shipping 1.If you need to buy in bulk, please contact, we will reply in 24 hours. 2.We are always working hard to ensure your package arrives as soon as possible. Please understand that some factors like weather, high postal traffic, and the performance of shipping companies are outside of our control. 3.Usually product Reaches after about 12-45 business days depending on destination. If you have not received your shipment within 45 days from payment, please contact us. We will track the shipment and get back to you as soon as possible with a reply. Refund or resend product will be offered if item still not received. 4.We maintain high standards of excellence and strive for 100% customer satisfaction! Feedback is very important. We ask you contact us immediately BEFORE you give us neutral or negative feedback, so that we can satisfactorily address your concerns. It is impossible to address issues if we do not know about them! THANK YOU :)