Wireless Welcome Doorbell, Wireless Alarm, Motion Sensor Alarm, Multiple Sounds Available, 280 Meters Transmission, 40mm Loud Speaker3 receivers1 Sensor

Simple InstallationFor the receiver, no wiring is needed, no installation hassle, self-adhesive mounting, and the detector is placed on the wall. Before use, please read the instructions carefully and insert batteries, then adjust the sensor's angle to prevent false alarms.
Note: This unit is intended for indoor use, so please avoid installing it in direct sunlight or rainy areas. Rich Ringtone ChoiceSplit sensor doorbell, the receiver offers 17 ringtones to select from, accompanied by bright 4-color LED lights. There are also 4 retail store welcome ringtones available. You can pick freely based on your own preference. Vibration AlertNew Silent Mode with Strong Vibration Alert is ideal for quiet settings or nighttime use, delivering a more private and distraction-free experience. Power Saving DesignWireless Welcome Doorbell utilizes the fourth generation of power-saving technology to reduce the inconvenience of frequent battery changes. It can be powered by batteries or USB-C, and can be recharged at any time, making it more convenient and eco-friendly to use. Applicable RangeThe working range between receiver and transmitter is up to 918 feet (280 meters). Suitable for stores, shopping malls, offices, factories, hotels, upscale clubs, homes, villas, and many other places