Waterproof Doorbell, Easy Installation-The doorbell is IP55 waterproof, with a simple design and simple operation. Wireless installation is very simple, the button is fixed on the outer wall, and the doorbell receiver is plugged in for use Extremely Reliable Transmission Distance-1300 feet of reliable wireless signal coverage, will not interfere with your home electronics, ensuring that you will never miss visitors or goods again, the transmitter battery life is up to 3 years, bringing an excellent user experience Various Ringtones and Adjustable Volume-55 ringtones for different choices, 5 levels of adjustable volume, you can hear the clear melody even if you are in another room and several floors away Loud Doorbell and Flashing LED-110dB loud doorbell with flashing LED is designed for the hearing impaired and the elderly, of course it can be set to 0dB to avoid interference Expandable and Supportive-If you want to expand the doorbell system in your home, you can add the same model wireless doorbell compact size receiver and transmitter so that it will not block your socket. The doorbell has a modern and elegant design, which is very user-friendly and comes with a standard European plug, which is compatible with the socket. Out of the box, it is paired, just plug in the receiver, stick the button on the door and it is ready to use. Door Plate: Optional doorbell plate, which can better signal your visitors or delivery personnel. 400m wireless range, interference-free area The doorbell is equipped with a high-quality built-in transmitter chip that can learn the code. Respond in real time when someone rings the doorbell, ensuring that you never miss a visitor or delivery. Strong penetration The signal is stable and penetrates walls and doors without interfering with home electronics. 55 ringtones and 5 adjustable volume levels (0-110dB). The default ringtone of the plug-and-play doorbell is "Ding Dong", and there are 55 different ringtones to choose from, including classic melodies, animal sounds, and party songs for various occasions. You can choose a unique melody and it is very easy to set up. The maximum volume is 110 decibels, which can be heard even on several floors. Dustproof and waterproof (IP55) The outdoor waterproof doorbell button adapts to different DE climates and has an operating temperature between -30 and 70. The transmitter is powered by 1 12V23A battery with a maximum service life of 3 years, so you don't need to replace the battery frequently. 0 Off If you don't want to be disturbed, you can set the off mode. Flashing Blue LED When someone rings the doorbell, the blue LED of the receiver will flash as a visual signal designed for the hearing-impaired. Memory Function The last set volume and sound will not be lost when the device is turned off or reconnected. Two installation methods are available 1. Use the included double-sided tape to fix the knob to the wall or door frame. 2. Use the screws (included) to fix it, but you will need a small electric drill to drill holes in the wall. Note: Do not fix the doorbell on a metal surface as this will reduce its wireless range. Door Plate: The optional doorbell plate provides a better signal for your visitors or delivery personnel.