Motion Sensor Door Chime For Business,Commercial Music Doorbell,Retail Store Welcome Buzzer,Sleepwalker Elderly Toddler Monitor,Detector Alarm FeatureEASY, FAST, WIRE FREE INSTALLATION: portable sensor detects motion-when entering and sends a signal to the receiver Humanized design, free angle adjustment: 180 Adjust bracket, 360 universal Adjust base, suitable for installation in various scenes, more convenient to adjust the angle of use Multi-language selection: built-in 11 languages to welcome the object, a variety of pleasing ringtones can be switched to high-pitched, beautiful and loud, greatly improving the purchase opportunity MULTIPURPOSE: motion activated sensor chime, door alarm,mailbox alert,entry alert chime for business welcome doorbell,cordless fall and Wander pet dog monitor alarm. Fall reminder for the elderly Wide range sensor, Adjust sensitivity: Adjust sensitivity, infrared sensing width 8m, distance sensing, sensing range angle adjust Wide range sensor, Adjust sensitivity: Adjust sensitivity, infrared sensing width 8m, distance sensing, sensing range angle adjust High-tone horn reminder, applicable to large scenes: built-in independent speaker, high-decibel audible welcome anti-theft reminder, high frequency, high-pitched frequency alarm Power supply system: can be connected to power supply, and can support battery power supply ,(Battery not include) Product parameters: Product name: sensor doorbellColor: whiteProduct principle: infrared inductionReaction range: up and down 60 , left and right 120 Detection distance: 0-8mProduct material: ABSProduct design: 360 rotationMaximum volume: 110bdAmbient temperature: - 10 C-30 CProduct use: doors and windows of villas, commercial houses, offices, etcPower supply mode: 5V, 3 AA5 batteries, USB data cable (Not included)Package size:14x10x6cm/ 5.51x3.94x2.36 inchGross weight:120g/ 0.26 lbThe Pakage Include:1 x Door bell1 x Installation tool1 x Use manual