Feature:1. Efficient Infrared Body Sensing: Intelligently recognizes human movements to ensure accurate doorbell triggering and improve safety.2. Indoor and Outdoor Two Way Voice Broadcast: When someone enters, it can remind the owner in time through voice broadcast to increase store security.3. Personalized Alarm Settings: With 36 chord music to choose from, support customize voice alarms for more choice and flexibility.4. Split Install: The equipment is split and can be installed in different locations of the store more flexibly to provide all round security protection.5. Multi Scenario Application: The motion sensor doorbell is suitable for store welcome, indoor security and home doorbell needs.Specification:Item Type: Motion Sensor DoorbellMaterial: ABS.Battery: 1.5V AAA lithium battery X3Receiver Working Current: 60mA, Quiescent Current: 7mAPower: 2WMusic: 36 polyphonic music to choose fromWorking Frequency: 433MHZControllable Volume: 20-80dB (4 levels of volume adjustment options)Remote Control Receiving Distance: 200-300m/656-984ft (open area)Transmitter Operating Frequency: 433MHZTransmitter Working Current: 12mALED Indicator: The transmitter senses people move, the LED indicator light on the transmitter is on, the transmitter is working, and the receiver receives the instruction, and also sends out beautiful music to remind you that there are VIPs visiting, and the LED light on the receiver is also accompanied by The music flickers regularlyWorking Temperature Range: -10-50Package List:1 x Transmitter1 x Receiver1 x Connector1 x Base2 x Screw2 x Expansion Bolt1 x Instruction Manual