Wireless doorbell with an effective range of 300 meters, equipped with two transmitters, waterproof outdoor doorbell, suitable for front and back doors, 52 ringtones to choose from and 4-level volume adjustment. Strong signal in all areas: Our doorbell has an effective range of up to 300 meters in open areas, ensuring you can contact visitors at any time. Whether you are in the garden, inside the house or even in the basement, you will not miss any visitors! Installation in seconds: Easily mount the wireless doorbell transmitter on the wall with the included screws or tape. Installation is complete in less than a minute. Suitable for all weather conditions: Our wireless doorbell is dustproof and waterproof and can withstand temperatures from -30°C to 70°C. It can withstand harsh environments and has extremely low power consumption, resulting in extended battery life. Personalized sound effects and flexible modes: Enjoy precise volume control with 4 adjustable volume levels, up to 110 decibels, perfect for the hearing impaired or elderly. Easily switch between LED indicator mode and LED indicator plus ringtone mode, and choose personalized notifications from 52 ringtones. The system automatically saves your last settings, ensuring you always use the latest configuration. Waterproof doorbell button for outdoor use: It adapts to various climates in Germany and works in temperatures from -22℉ to 158℉ (-30℃ to 70℃). 0dB silent mode and LED flash: The LED indicator flashes when someone rings the doorbell, which is very useful for people with hearing loss. If you do not want to be disturbed, you can turn off the doorbell to 0 decibels; the LED indicator will still flash to indicate that someone has rung the doorbell. Memory function: Saves previously set music and volume levels, so you do not need to reset them after a power outage. 1 plug-and-play receiver and 2 battery-powered transmitters.