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. 45 beautiful chimes and melodies: Offers 45 classic melodic chimes with adjustable volume control and diverse selection to meet your needs. 4 adjustable volume levels from 0dB to 110dB, 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 transmitter design, made of ABS, no toxic, safe and recyclable, which can work at temperatures between -20 and 65, and withstand various harsh 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 wireless range / 500FT, 2 plug-in receivers included, won't interfere with other equipment in your home or 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. 150M/500FT Wireless Range Long Operating Distance With a reliable 150M/500ft 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 in homes, factories, offices, classrooms, apartment buildings, villas and other large spaces. 45 Melodies to Choose You can choose from 45 different musical chimes, choose a different one every day! The wireless doorbell also has an adjustable volume with 4 levels from 0 to 100db to suit your needs. IP44 Waterproof and Dustproof The transmitter with IP44 dustproof and waterproof rating, working temperature from -20 to 55, no need to worry about harsh weather, sunshine, rain, snow, frost, etc. No Battery Required 0 db Mute Mode LED Indicator Self-powered Remote Button When you press the button on the doorbell transmitter, 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, don't worry about the doorbell receiver rings to disturb a sleeping baby or a hearing impaired person. LED Indicator The pleasant ringtone as well as the LED will flash when you press the transmitter and a signal is received. A flashing light with audio alert indicators is easy for the hearing impaired to notice. Easy to Install Design Compact and Stylish Best Gifts Easy to Use Simply stick the wireless doorbell next to your door using the included double-sided tape or use the screw to secure the cover to the wall. Then plug the receiver into a power outlet. Compact and stylish design The wireless doorbell adds a touch of elegant finish to your decor. Its clean and modern look allows it to find its place in all environments. Best Gifts Widely used for the home, office, hotel, villa, hospital, office, apartment, school and other suitable areas. And it is the best gifts for your family, friend and lover. Ideal for the hearing impaired.