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). Stereo speaker delivers rich and clear sound, you can easily choose and set your favorite ringtones as you like. 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. Robust and IP44 Waterproof Push Button Modern and elegant design in classic black and white, excellent materials protect it from high temperature and interference. IP44 Waterproof, works between 14F and 140F; withstands various harsh weather conditions, acceptable for outdoor use. Easy to Install Just plug the mini receiver into an outlet and fix the transmitter on a wall with the double-sided adhesive tape, but before fixing the transmitter, please remove the insulation sheet from the battery, very easy to install. Does not interfere with other equipment in your home or your neighbors, ensuring you never miss a visitor. This wireless doorbell is by far the most convenient choice for your home and business.