Doorbell, Multiple Ringtones Receiver Transmitter, Easy Install, 20-30 (open space) Meters, 15 (home) Meters for School Hospital Laboratory

Mini Doorbell The doorbell adopts and reception , which is easy to install and will not destroy the beautiful effect of the room decoration.
Digital Door Viewer Support Remote Control The remote control distance can be as long as 20 30 meters (open area) (due to interference from home metal , security doors , walls , steel bars , etc. , the general remote control distance used at home is about 15 meters) , which can meet all kinds of residential and high rise buildings. The demand for buildings.
Multi purpose Outdoor Door Bell The Launch Part Needs to be Fixed The parts of the launching part need to be fixed at the door or the place where rain can not be wet with double sided tape to prevent the rain from dripping.
Smart Doorbell Battery Powered The receiver requires 2 AA batteries , and the transmitter requires a 23A battery (battery included). In a static environment , the receiver and transmitter do not consume power , and the battery can last for one year.
Compact Door Chime- Wear-resistant and The doorbell chime made of ABS material is very , small and compact. You will get: 1* receiver, 1* transmitter, 1* battery, 1* double sided sticker after purchase.