There are 60 different ringtones with 5 adjustable volume levels from 0dB to 110dB (mute level design, good for using at home when baby is sleeping).The 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.The range can reach 150 meters in open field, allowing 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.Modern and stylish design in classic black and white, excellent materials protect it from high temperatures and interference.IP44 waterproof, operates between 14°F and 140°F;withstands various harsh weather conditions, acceptable for outdoor use.A modern and stylish design in classic black and white, excellent materials protect it from damage. Simply plug the mini receiver into an outlet and attach the transmitter to a wall using the double-sided tape, but firstTo fix the transmitter, please remove the battery insulation sheet, very easy to install.Does not interfere with other equipment in your home or that of your neighbors, ensuring you never miss a visitor.This wireless doorbell is by far the most convenient choice for your home and business.