No Battery Required: Our wireless doorbell transmitter uses unique PUSH-RF technology. When you press the button, the kinetic energy is converted into an electrical signal that rings your doorbell wirelessly. No more worrying batteries. More convenient, more energy-saving and more practical than the old one. 52 Beautiful Chimes and Melodies: Offers 52 classic melodic chimes with adjustable volume control and diverse selection to meet your needs. 4 adjustable volume levels from 0dB to 90dB, which is loud enough for old people to hear; enjoy pleasant melodies whenever someone rings your doorbell. The LED indicator gives you a visual form of notification (a great feature for the hearing impaired). IP44 Waterproof: IP44 rating Waterproof design of the transmitter, made of ABS, non-toxic, safe and recyclable, which can operate at temperatures between -20 and 65, and withstand various severe weather conditions, sunshine, rain, snow, frost etc. Widely used for home, office, hotel, villa, hospital, office, apartment, school and other suitable fields. Long Wireless Range: With 150M/500FT wireless range, 2 plug-in receivers included, do not interfere with other equipment in your home or those of your neighbors; ensures that you will never miss a visitor, even if you are a few rooms away or on another floor. Ideal for large homes, warehouses, offices, etc. Easy to Use: Convenient and easy to use design for better user experience. Simply stick the doorbell next to your door using the included double-sided tape or use the screw to mount the cover to the wall. then plug the receiver into a power outlet. All wireless doorbells can be re-paired and controlled together. Long Operating Distance With 150M / 500ft reliable wireless range and strong signal penetration, the doorbell will never fail to alert you when someone comes to the door. Enjoy a reliable, hassle-free doorbell system at home, in factories, offices, classrooms, apartment buildings, villas and other large spaces. 52 Melodies to Choose You can choose from 52 different musical chimes, choose a different one every day! The wireless doorbell also has adjustable volume with 4 levels from 0 to 90db to suit your needs. IP44 Waterproof and Dustproof The transmitter with IP44 waterproof rating dust-proof and waterproof, working temperature from -20 to 65, no need to worry about harsh weather, sunshine, rain, snow, frost, etc. > Self-Powered Remote Button When you press the doorbell transmitter button, it converts kinetic energy into an electrical signal that rings your doorbell wirelessly. No battery required. Mute Mode Silent volume level provides disturbance-free notification, never worry about the doorbell receiver ringing to disturb a sleeping baby or hearing impaired person . LED Indicator Pleasant ringer and LED flashes when the transmitter is pressed and a signal is received. A flashing light with audio alert indicators is easy for the hearing impaired to notice. Easy to Use Simply stick the wireless doorbell next to your door using supplied double-sided tape or use the screw to secure the cover to the wall. Then plug the receiver into a power outlet. Compact and Sleek Design The wireless doorbell adds a stylish finishing touch to your decor. Its clean and modern look makes it fit in any environment. Best Gifts Widely used for home, office, hotel, villa, hospital, office, apartment, school and other appropriate areas. And it is the best gifts for your family, friend and lover. Ideal for the hearing impaired.