Shop keeper in day time, anti-thief in the night. Place the PIR motion sensor at the entrance to your driveway or anywhere you want to be alerted to motion. It detects movement and sends a wireless signal to the portable receiver from up to 918 feet (280m). 5-in-1 multi-mode (Welcome/ Doorbell/ Alarm/ Colorful Light/ Night Light). 8 chord music chip, 40mm speaker, 36 chime melodies. Remembers the last setting of melody and volume level after power off. Colorful LED lights with adjustable brightness. Distinguish multiple entrances by different colors. 4 adjustable volume levels (Loud/ High/ Middle/ Low) from 113 ~ 25dB. The receiver can learn up to 32 wireless sensors such as PIR motion, magnetic, or vibration sensors, as well as up to 8 remote controllers. Low battery indication. Ideal for front doors, window frames, driveways, walking paths, and other areas in your home where motion alerts are needed. Also suitable for business owners who need notification when customers enter their store while working in the back or out of sight. 5-In-1 Multi-Mode: Welcome Mode: Plays "Welcome" in 5 languages, suitable for shops, stores, restaurants, and supermarkets. Doorbell Mode: Door open chime with 36 selectable tunes. Alarm Mode: Up to 113dB alarm to help deter intruders, alert occupants, or notify neighbors. Colorful Light Mode: Silent operation with 4 color options, ideal for quiet environments. Night Light Mode: Functions as a floodlight. When the magnetic sensor is activated, the receiver automatically turns on the light with 4 adjustable brightness levels. Volume range: 113 ~ 25dB Power Supply (Receiver): USB or 3 x AAA alkaline batteries (not included) Power Supply (PIR Transmitter): USB or 3 x AA alkaline batteries (not included) Battery lifespan: 5-7 months (based on 30 minutes of use per day) Wireless range: 280m / 918ft Motion detection range: 2 - 8m / 6.6 - 26ft Ring volume: up to 113dB Working frequency: 433.92MHz Color: White Material: Plastic Number of Sensors: 3 Package Contents: 1 x Host 3 x Sensor Only the above package content is included; other items are not part of the package. Note: Light reflection and different display settings may cause slight color variations between the image and the actual item. Measurement error allowance is +/- 1-3cm.