Tilvision Self-Powered Wireless Doorbell for Home - 1 Push Button Ringer & 1 Chime Receiver, Battery Free Cordless Doorbell, 656 Feet, Wireless Door Bell w/LED Flash, White - QH-866Z1

• Self-Powered Wireless Doorbell：The doorbell chime requires no batteries,you don't need to worry about battery replacement anymore. When the door bell ringer button is pressed,it'll generate electric power by itself and send a signal to the doorbell for classroom, classroom doorbell for teachers will make a sound to remind you. Long Transmitting Range：Transmitting distance of wireless doorbells for home is up to 656ft in the open area, no matter you're in bedroom, kitchen, living room or reading room, door bell ringer wireless is always able to operate properly, you won't miss a visitor or a delivery. Different Working Modes,More Choices：The cordless doorbells for home has three working modes (ringing only, LED falshing only, ringing & LED flashing together) for selection. If you don't want to be disturbed, LED flashing only is the best choice. Easy Installed with Memory Function：No wires required, stick the doorbell button wireless to a door or a wall with double-sided adhesive tape, and plug wireless doorbell chime into an outlet, then you can start to use them. The doorbell receiver can remember selected melody and volume, no need to rematch them after a power outage. IP55 Dustproof and Waterproof：The wireless doorbell push button could withstand severe weathers and temperatures range from -4 °F to 140 °F, such as wind, snow, rain, extreme hot or extreme cold., Manufacturer: Tilvision