A. Waterproof and easy to install: This doorbell meets the IP55 waterproof standard. It has a simple design and is easy to operate. It supports wireless installation, which is quite convenient. You just need to fix the button on the exterior wall and plug the doorbell receiver into a power socket to use it. B. Ultra-reliable transmission distance: It has a coverage range of 1300 feet, providing a reliable wireless signal without interfering with the electronic devices in your home, helping to ensure that you won't miss any visitors or packages. The battery of the transmitter can last up to 3 years, offering a good user experience. C. Multiple ringtones and adjustable volume: It offers 55 different ringtones for you to select from, and the volume can be adjusted in 5 levels. The melody is clear, so you may be able to hear it even if you are in different rooms or several floors away. D. Loud doorbell with flashing LED lights: This 110 - decibel doorbell is equipped with flashing LED lights. It is designed for people with hearing impairments and the elderly. Of course, you can also set the volume to 0 decibels to avoid being disturbed. E. Expandable and comes with a bracket: If you want to expand the doorbell system to other places in your home, you can add receivers and transmitters of the same model. The product comes with a 24 - month warranty, giving you some peace of mind. F. There are two installation methods for you to choose from: 1. Use the included double - sided tape to stick the button on the wall or door frame. 2. Fix it with screws (screws are included), but this requires using a small electric drill to drill holes in the wall. G. Note: It is not advisable to fix the doorbell on a metal surface, as this may shorten its wireless transmission distance. H. Doorbell panel: An additional doorbell panel can provide a better signal for visitors or couriers. I. Mute function: If you don't want to be disturbed, you can set the doorbell to mute. J. Flashing blue LED lights: When someone presses the doorbell, the blue LED lights on the receiver will flash. This is a visual signal designed for people with hearing impairments. K. Memory function: After the device is turned off or reconnected, the previously set volume and ringtone will likely not be lost. L. 55 ringtones and 5 levels of adjustable volume (0 - 110 decibels): The default ringtone of this plug - and - play doorbell is the "ding - dong" sound. In addition, there are 55 different ringtones, including classic melodies, animal sounds, and party songs suitable for different festive occasions. You can choose a unique melody, and the setting is relatively simple. M. The maximum volume can reach 110 decibels, so you may be able to hear it even if you are several floors away. N. Dustproof and waterproof (IP55): The outdoor waterproof doorbell button can adapt to different climate conditions and can work normally in the temperature range of - 30°C to 70°C. O. The transmitter is powered by 1 12V23A battery, and the battery can have a maximum service life of 3 years. Therefore, you don't need to replace the battery frequently.