60 Ringtones & 5 Volume Levels - There are 60 different ringtones with 5 adjustable volume levels from 0dB to 110dB (mute level design, good for home use when baby is sleeping). The stereo speaker delivers rich and clear sound, you can easily choose and set your favorite ringtones as you like. The flashing light indicators are easy to notice for people including the hearing impaired. Super Long Range - The range can reach 150 meters in open field, which allows you to hear and answer the doorbell in time. Whether you are busy a few rooms away or on another floor, in the garden or kitchen, you will always be easily informed when someone calls from outside, never worry about missing visitors. IP65 Waterproof & Heavy Duty Push Button - Modern and elegant design in classic black and white, excellent materials protect it from high temperature and interference. IP65 waterproof, works between 14°F and 140°F; withstands various harsh weather conditions, acceptable for outdoor use. Easy to