Feature: 1. Induction Alarm: The infrared alarm has a high sensitivity induction function, which can issue an alarm in time when someone is close to improve the safety of the family. 2. Waterproof Design: Due to the waterproof design of the sensor alarm, it can be installed for outdoor use without worrying about the impact of rainy days. 3. Split Design: Sensor and receiver can be installed in different locations, you can choose to install in the garage, corridor and other different locations. 4. Wireless Connection: The infrared alarm can be easily installed in any area that needs to be monitored, without complex wiring installation, and is more convenient to use. 5. Multiple Music Options: The infrared sensor alarm supports 38 different music tones, easy to adjust, you can choose according to your own preferences. Specification: Item Type: AlarmMaterial: Abs Size: Receiver: Approx. 80 x 76 x 33mm / 3.1 x 3 x 1.3in Transmitter: Approx. 90 x 80 x 53mm / 3.5 x 3.1 x 2.1in Transmitter: Battery Type: Lithium Battery Battery Model: 1.5vaaa x 3(Shipped without batteries)Operating Frequency: 433mhz Receiver Button: 1) Music: 38 Pieces of Music Are Optional, And the Music Logo Button on the Side Is Adjusted 2) Volume: Three-Stage Volume Adjustment (High, Medium, Low) Side Volume Sign Button for Adjustment 3) You Can Set Sound and Silent (Sound: Sound + Indicator Light Silent: Indicator Light) Working Distance: Approx. 100m / 328.1ftTransmitter Sensing Distance: Approx. 7m / 23ft. Package List: 1 x Transmitter 1 x Receiver1 x Connector1 x Base 2 x Screw 2 x Expansion Bolt 1 x English Manual