Infrared welcome doorbell sensor for business entrance (1 piece)

Instant Motion Detection: Equipped with a sensitive infrared sensor that activates instantly upon detecting motion within a range of 4 to 6 meters, you'll never miss a customer or visitor entering your store or home. Customizable Alerts: Features 2 operating modes (sound + LED or LED only) and 38 selectable ringtones. Adjust the volume to 3 levels (25-80 dB) to perfectly suit noisy environments or quiet maintenance settings. Extended Wireless Range: The transmitter and receiver communicate effectively up to 328 ft / 100 meters, allowing for flexible placement in aisles, large warehouses, or multi-room homes without signal loss. Versatile Use: Ideal for retail stores, offices, factories, and private homes. Works as a welcome buzzer for customers, a security alarm for intruders, or a caregiver pager for monitoring the elderly. Easy wireless installation: no complex wiring required. Simply plug the receiver into any standard outlet and mount the battery-powered sensor (3 AAA batteries not included) on walls or doors for immediate use.