Modern and Practical DesignOur wireless doorbell comes with stylish appearance and practical functions. Lightweight and sensitive, there are illuminated halo and LED strobe alerts on the receiver. Operating range up to 1000ft in open area, offer you fast indication, which ensures you to hear the bell and answer the door in time. 4Volume 45 Ringtones For Your Choice There are 45 ringtones and 4 adjustable volume levels(included silent mode) to choose from. The 45 kinds of ringtones can be chosen as per you like. With adjustable volume from 20db to 110 db, it will suitable for most of your room. Easy Installation No batteries & plug receiver required. The easily installed transmitter will be set up in only several minutes.And there are 2 ways to place your receiver-by sticker & screws. More Than a Door Bell !Expand applications by yourself, e.g. use it as a dog or a cat training assistant device. Reminder & WARRANTYIf continuous button pressing is required, please press again the button after the ring sound stopping rather than continuous button.You will get a full refund or a brand new replacement if you are not satisfied with it.