Is it possible to use a wireless doorbell without a battery?
The 'door bell' was less commonly heard in ancient China. The wealthy big family had a decorative knocker on the front door. The door-calling person could use the knocker to bang the nails under the ring and make a loud noise. There was a modern 'doorbell'. The role. The 'door bell' often appeared in ancient films of foreign films, and many wealthy people also hung a huge bronze handle in front of the door. When the coachman sends the guests to the front door, he will pull the bells inside to try to show someone. In modern times, 'doorbell' is no longer a special item for wealthy people, and 'doorbell' has been widely used by ordinary people. A wide range of 'doorbells' abound, and the 'doorbell' is not limited to the use of doors by guests. That is, the bell on the door can make a sound to remind the owner to visit. The more common doorbells are ordinary wireless doorbells, wireless doorbells without batteries, and wired doorbells. The wireless doorbell without battery means that the transmitter uses energy capture technology to collect energy when the user presses the doorbell button and converts the energy into electrical energy to drive the doorbell sounder to ring. The indoor unit, which is the doorbell sounder, needs to be connected to the mains. The control signal generated by the doorbell button is transmitted through the wireless signal transmitter, and the wireless signal receiver of the indoor unit receives this wireless signal and then rings. Labeling Machine,Sticker Labeling Machine,Bottle Labeling Machine,Label machine Hangzhou Jingyi E-commerce Co.,Ltd , https://www.jypackmfg.com