Durable Wireless Doorbell Waterproof & Dust-proof, remote transmitter button is rated IPX4 weatherproof. Works between -22°F to 158°F Withstand various harsh weather conditions, acceptable for outdoor use. Easy Installation Simply plug the receiver into a power outlet & attach the transmitter to the transmitter to the exterior wall with the provided screws or adhesive patch. This wireless doorbell set is the most convenient choice for your home & business. 36 Beautiful Chimes BIKUUL Doorbell offers a wide selection of 36 chimes for your personal taste. Flashing light with audio alert indicators which is easy to use, including the hearing impaired to notice. Wide Wireless Range: Will not interfere with other equipment in your home or those of your neighbors Ensures that you will never miss any visitors, even if you are several rooms away. 100% Satisfaction BIKUUL Wireless Doorbell is approved by FCC, CE & RoHS. If you have any quality problems, you can reach out to us for after-sales services, we will always do our best to support you.