60 Ringtones & 5 Volume Levels - There are 60 different ringtones with 5 adjustable volume levels from 0dB to 110dB (silent mode, great to use at home when the baby is sleeping). The stereo speaker delivers a 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. Extra Long Range - The range can reach 150 meters in an 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 is ringing from the outside, never worry about missing visitors. Robust IP65 Waterproof Push Button - Modern and elegant design in classic black and white, excellent materials protect it from high temperature and interference. IP65 waterproof, works between -5.5°C and 60°C; withstands various severe weather conditions, acceptable for outdoor use. Easy to Install - Just plug the mini receiver into an outlet and attach the transmitter to a wall using the double-sided tape, but before attaching the transmitter, remove the insulation sheet from the battery, very easy to install. Does not interfere with other equipment in your house or your neighbors, ensuring you never miss a visitor. This wireless doorbell is by far the most practical choice for your home and business. Long Wireless Range The wireless signals reach up to 150 meters in an open space and do not interfere with other equipment in your home or your neighbors. You will never miss a visitor. LED Flash When you press the button, the doorbell transmitter and receiver flash simultaneously. The flashing lighting together with sound alert indicators are easy to perceive for people with hearing impairment. Waterproof Push Button The impressive IP44 rating for dust and water resistance and the approved working temperature range from -30°C to 70°C make the transmitter button robust enough to withstand almost all outdoor conditions.