General description Wireless infrared passage detector designed for various environments such as businesses, hotels, and homes. This versatile device functions as a shopkeeper during the day and an anti-theft alarm at night. It features a doorbell function, colorful lighting, and multi-function capabilities, making it a 5-in-1 solution. Technical specifications Transmission range: up to 280m Music chip: 8 chord Horn diameter: 40mm Number of chime melodies: 36 Volume levels: 4 adjustable levels (loud/loud/medium/low) ranging from 113 to 25 dB Other information Remembers the last set melody and volume when turned off Features multi-color LED lights with adjustable brightness