Wireless doorbell KERUI M521 with a base in a socket, 57 melodies, operating distance up to 100 meters

The KERUI M521 wireless doorbell has a new interesting design. Supports 57 different ringtones, as well as adjustable ringer volume. The wireless call operating distance is about 100-120 meters. The internal part is installed indoors and plugged into a 220 Volt socket, and the wireless call button is installed outside the home or room and runs on CR2032 batteries. The button's moisture protection level is IP55. A wireless doorbell for an apartment or house can work through walls and doors. The wireless home doorbell can also work in conjunction with other KERUI sensors or devices. Characteristics: - Operating voltage: AC 100-240V; - Operating current: less than 100mA; - Wireless transmission frequency: 433 MHz; - Wireless transmission range: 100-120 m (in open space); - Adjustable ringer volume: 4 levels: 25dB-110dB - Operating temperature: -10 50 degrees Celsius; - Bell button battery: CR2032 3V (up to 3 years of continuous operation). Equipment: -1x Bell internal part; -1x Bell button with CR2032 battery; -1x Box; -1x Instructions.