Door Chime,Wireless Business Door Motion Sensor Detector Smart Visitor Doorbell Home Security Alarm With 1 Plug-In Receiver And 1 PIR Detector Waterproof Feature: USER-FRIENDLY: The door bell chime have 4 LEVE-L volume adjustment and 38 Ringtones to choosePIR TECHNOLOGY : Our sensor uses state-of-the-art passive-infrared (PIR) sensor to detect any movement within the detection range. Perfect for long or hidden driveways and allows you a fore WARNI-NG when guests (or intruders) are approachingEFFECTIVE DISTANCE: Working range is up to 200 meters. Infrared sensing distance is 3-7 meters. It can be successfully used for your home, office, shop, hotel or other buildingsAPPLICATIONS: It is not just a alert, you could use it as an intruder alarm, alleyway alarm, critter detector, car alarm(interior), warehouse monitor, supply closet alarm, garage and tool SH-ED monitor, box sensor, front door or walkway detection. Also great to alert business owners that are working in the back, or OUT OF SIG-HT, to customers entering their store. Use as a signal when pet is ready to come in or outEASY INSTALLATION: As for this visitor chime, there are no wires to run, no installation hassles, the sensor is wall MOUNTA-BLE. You just need to put in the batteries(not included), and place the wireless motion sensor and alarm receiver wherever you prefer Product parameters: Product type: intelligent wireless doorbell Power supply mode: DC Working voltage: receiver 110-240V, transmitter 4.5V (not include 3xNo. 7 batteries) Power consumption: 2W Induction angle: 120 degrees Sensing distance: 3-7M RF frequency: 433MHz LED color: Blue Waterproof grade: IP52 Ringtones: 38 Volume adjustment: 4th gear Scope of application: outdoor courtyard, family, home Doorbell: 8.5x8cm/3.35x3.15 inch, net weight 73.5g/0.16 lb Receiver: 8x8cm/3.15x3.15 inch, net weight 56g/0.12 lb Package size: 11x8.5x9.5cm/4.33x3.35x3.74 inch Gross weight: 150g/0.33 lb The Package Include: 1 x Wireless doorbell 1 x Ding-dong machine 1 x Use manual 1 x Installation tools