Wireless doorbell KERUI M523 F55 with base in socket (Black)

Wireless doorbell - This is an integral attribute of any home. This device has a simple task: you should hear what someone has come to you from anywhere in the room. These calls work at a distance, even through dense concrete or brick walls. You don't need to hammer into walls or run wires. Operating range - 150 meters. But, of course, if there are thick walls, metal doors or some other obstacles on the way, then the signal transmission range will be less. The ideal place to use this bell model is a private home or apartment, but it can also be used as an internal button for calling personnel or security in an office or store. This call may be needed when caring for elderly or sick people, to call a nurse. You can also combine several devices, for example, by placing one unit in the house (setting the volume down) and the second in the backyard (and making it louder) you can also connect up to 20 call buttons. There is also an invaluable alarm function. You can connect wireless sensors for water leaks or door openings, motion, etc. to the call. When the sensor is triggered, you will hear an alert in the form of a serena. The function will work independently of the doorbell with a separately selected melody or sound. Main characteristics: - Doorbell function, alarm and welcome alarm; - 32 melodies; - Long distance transmission up to 150m; - 4 levels of adjustable volume. Specification: - Operating voltage: AC 100-240V; - Operating current: less than 100mA; - Wireless transmission frequency: 433 MHz; - Wireless transmission range: 150 m (in open space); - Operating temperature: -10 - 50 degrees Celsius; - Operating current: 8 - 15 mA; - Reserve current: 3uA; - Bell button battery: CR2032 3V (up to 3 years of continuous operation). Equipment: -1x Central bell block - 1 piece; -1x Button -1pcs; -1x Box; -1x Instructions.