Note：This item comes with plug, please confirm the voltage of your area before purchasing. This item is perfect for apartments or single-story homes, it comes with 1 button chime. With 56 chime tone options, this doorbell is a for everyday use. Our doorbells that are great for commercial space and offices. They also work well for large homes or villas. Features - Color: White. - Material: Plastic. - Size: 8.2 x 8.2 x 7 - Receiver voltage: AC110v. - Working Temperature: - 30 ~ + 70 degree. - Operating frequency: 433.92 MHz + 280 KHz. - Waterproof: IP55. - The doorbell can use in office,home, hospital,factory,restaurant or you need it. - 300 meter receiving distance (In the open area),Stable quality is for villas, hotels, schools and other areas - The button cannot be placed on an iron door because it will with the - Just plug the receiver into an electrical outlet,the push button transmitter can be stick it to the door with provided adhesive tapes - Durable, weatherproof & : This doorbell sets are designed for both indoor and outdoor use Package list: 1 x Door Bell 1 x Receiver