_x005F_x005F_x005F_x000D__x005F_x005F_x005F_x000D_This item is perfect for apartments or single-story homes, it comes with 1 button and 1 chime. With 56 chime tone options, this doorbell is a smart selection for everyday use. Our expandable doorbells that are great for commercial space and offices. They also work well for large homes or villas._x005F_x005F_x005F_x000D__x005F_x005F_x005F_x000D_Features_x005F_x005F_x005F_x000D__x005F_x005F_x005F_x000D_- Color: White._x005F_x005F_x005F_x000D_- Material: Plastic._x005F_x005F_x005F_x000D_- Size: 8.2 x 8.2 x 7 cm._x005F_x005F_x005F_x000D_- Receiver voltage: 110-260V/50-60Hz._x005F_x005F_x005F_x000D_- Working Temperature: - 30 ~ + 70 degree._x005F_x005F_x005F_x000D_- Operating frequency: 433.92 MHz + 280 KHz._x005F_x005F_x005F_x000D_- Waterproof: IP55._x005F_x005F_x005F_x000D_- The doorbell can use in office,home, hospital,factory,restaurant or any where you need it._x005F_x005F_x005F_x000D_- 300 meter receiving distance (In the open area),Stable quality is for villas, hotels, schools and other areas._x005F_x005F_x005F_x000D_- The button cannot be placed on an iron door because it will interfere with the signal._x005F_x005F_x005F_x000D_- Just plug the receiver into an electrical outlet,the push button transmitter can be stick it to the door with provided adhesive tapes._x005F_x005F_x005F_x000D_- Durable, weatherproof & dustproof: This wireless doorbell sets are designed for both indoor and outdoor use.Packing list: 1 x Wireless Door Bell_x005F_x005F_x005F_x000D_1 x Receiver