Parameters Frequency: 433MHzTransmission Distance: 280m(Open Area)PIR Sensor Angle: 100 degree(horizontal);15 degree(vertical)Sensor Range: 2~8mVolume: 4 levelBrightness: 4 level Power Supply Receiver: 3* AA battery(Not included) or USB 2.0 micro-B(Not included) Motion sensor: 2*AAA battery(Not Included) or USB 2.0 micro-B(Not included) Welcome mode When customers pass by, doorbell receiver will ring welcome song to remind you. This mode is suitable for shops, grocery stores, small business. Doorbell mode When friends or families come to visit you; When your takeaway, package comes, you will get prompt message even you are at 2nd or 3rd floor. Burglar mode When motion senser is placed at entrances of House, Shop, Small Business, Barn, Factory or Any Other Buildings, receiver is under anti-theft mode.
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