KERUI M518 Self Generation Wireless Doorbell Home Smart Electronic Remote Control No Need Battery
Description : Self power generation wireless doorbell,integration with 52 songs, adopts advanced wireless transceiver technology and high-quality voice processing technology. Wireless doorbell can be applied to apartment, villa,shop, hotel,home, office building, meeting room ect. Features : Self power generation No need battery, press button and energy turn into electrical energy. Ordinary doorbell was average changed a battery once a month, Every year need 12 batteries, one battery costs 1 dollar. You can save lots of money and batteries every year. Colorful light flashing with tones Doorbell Receiver flashing along with playing tones, easy to remind people there is someone coming. Light is about 0.3W, only 1-3 kWh a year 52 available tones 52 tones for your option, you can select regularly,and don't feel bored.Avoid the same ring with the neighbors. 5 adjustable volume level After a busy working day and want a relax sleeping time, you can adjust it to mute. While the maximum volume can up to 100dB. Long distance transmission Long operating range can be up to 330ft(100m) in open space, great for large house including villas, apartment, offices, shops, warehouses, etc. Easy installation Just plug the receiver into power socket and attach the transmitter on door, you don't even necessarily have to make holes or damage anything. Emergency call function There are two methods to learn bell button, one for doorbell function, the other is for emergency call function.you can selected a certain tone as emergency calling tone. It is very useful for old people and Pregnant women. Specification : Power supply : AC 100~240V 50-60Hz Standby currents:
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