CACAZI FA12 60 Songs 5 Levels Adjustable Wireless Doorbell Calling Bell (Type 86 Big Button),2 Transmitters+1 Receiver - Gold\/EU Plug \u2022The wireless doorbell offers a wide selection of 60 melodies and 5 volume levels to meet your needs for different occasions. Flashing light with audio alert indicators which is easy for people including the hearing impaired to notice \u2022Operating range up to 500ft\/150m in open area,ensures you to hear and answer the doorbell in time. You will never miss a visitor even if you are a few rooms away or on another floor. Easy to install with the double side adhesive tape or the screws \u2022Easy to install. Just plug the receiver into power socket and attach the transmitter on door,you don`t even necessarily have to make holes or damage anything \u2022Button is waterproof,don't worry about extended use \u2022Specifications: \u2022Model: FA12 (Type 86 Big Button) \u2022Music: 60 music options \u2022Volume: 5 levels (can be adjusted to only flash) \u2022Transmitter: No battery required,press to generate electricity \u2022Receiver: Lights up only when the bell rings \u2022Transmitter size: 86 * 86 * 22mm \u2022Receiver voltage: Plug in the power supply for use (AC110V\/220V) \u2022Receiver size: 70mm * 70mm * 22mm \u2022Remote control distance: 150M straight line on the ground (data from the factory laboratory) Package included: \u20222 x Transmitters \u20221 x Receiver \u20221 x English User Manual \u20221 x Pack of Installation Accessories