【Long Range & Strong Signal】300m/1000ft open range, the signal can penetrate obstacles well. Whether you're cooking in the kitchen or weeding the garden, this doorbell will keep you informed so you'll never miss your visitor. 【High Performance Transmitter】You have a variety of optional melodies and ringtones from 0-110 dB, 3 volume levels, you can adjust it at will, easily select and set your favorite tone. It is made of special waterproof material, which can work well even in rainy days. IP44 water and dust resistant; with an operating temperature range of -4°F to 140°F, it can withstand a variety of harsh weather conditions. 【Easy Installation】Just plug the receiver into the wall outlet, install the button with the provided double-sided tape, or screw it into the wall. 【Distinguish front and rear doors】1 transmitter and 1 receiver, you can program each button to a different tone or different music so you know where your guests are. This is a very handy feature for multiple door entries.