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 practical, more energy efficient and more practical than the old one. Waterproof IP44 & Temperature Display: IP44 Rating Waterproof design of the transmitter, made of ABS, non-toxic, safe and recyclable, can work in temperatures between -20 and 65, and withstand various harsh weather conditions. LED temperature display screen, Celsius/Fahrenheit temperature appears when the receiver does not ring, can be used as an indoor thermometer. 38 beautiful chimes and melodies: Offers 38 classic melodic chimes with adjustable volume control and a diverse selection to meet your needs. 4 volume levels adjustable from 0dB to 100dB, which is loud enough for older people to hear; enjoy pleasant melodies every time someone rings your doorbell. The LED indicator gives you a visual form of notification (a great feature for the hearing impaired). Long Wireless Range: With a wireless range of 150M/500FT, 2 plug-in receivers included, no #39;do not interfere with other equipment in your home or that of your neighbors; ensures that you will never miss a visitor, even if you are a few rooms away or on a different floor. Ideal for home, office, hotel, villa, hospital, office, apartment, school and other suitable fields. Easy to Use: Practical and easy-to-use design for a better user experience. Simply tear off the film on the transmitter and stick it next to your door. then plug the receivers into the power outlets. All wireless doorbells from can be re-paired and controlled together. Please do not hesitate to contact us if you need assistance. This T195 wireless doorbell kit includes one transmitter and two receivers with power display. LED temperature.