Special features:Doorbell set, consisting of a bell push button and receiver (battery-powered bell model).Self-learning with any additional receiver.5-step function for controlling the bell volume, including full mute, depending on user preference, and the ability to select a melody from 60 different sounds (including occasional sounds such as Christmas).The device has 3 signal modes that allow you to adjust the sound and light to your expectations or the time of day.One of the modes is a striking, color-changing light ring that catches the eye, even when the sound is muted or completely off.This solution will work well, for example, during a child's nap. You can also mute the sound and only leave the lighting on, or turn off the lighting, leaving only the sound.You can also use both forms of signaling simultaneously.Technical specificationsBrand: VironeTransmission range: 300m (open field)Sound intensity: 92 dBまれたFrequency: 433.92 MHzReceiver dimensions: 81 x 81 x 34 mmPush button dimensions: 36 x 66 x 18 mm