Feature:1. Diverse Music Selection: With 38 different melodies available, practical and reliable, you can choose the perfect ringtone for different places.2. Security Protection: This alarm system is equipped with anti theft alarm functionality, protecting your home and property security.3. Waterproof Design: This infrared alarm features a weather waterproof design that ensures reliability and durability in all weather conditions.4. Wireless Connectivity: The wireless connection function makes the installation simpler and more flexible, saying goodbye to the trouble of wiring.5. Versatile Installation: The split design allows for convenient installation in various locations such as garages, hallways, and more.Specification:Item Type: Infrared AlarmMaterial: ABSPlug: US Plug 110 - 240VProduct Size: Receiver: approx. 80x76x33mm/3.14x3x1.3in, transmitter: approx. 90x80x53mm/3.54x3.14x2.08inTransmitter: Battery type: Lithium battery Battery model: 1.5VAAAx3 (shipped without batteries)Operating Frequency: 433MHZReceiver Button:1. Music: 38 songs of music are optional, and the music sign button on the side is adjusted2. Volume: 3 stage volume adjustment (high, medium, low) side volume sign button for adjustment3. You can set sound and silent (sound: sound + indicator light silent: indicator light)Working Distance: Approx. 100 meters/328.1ftTransmitter Sensing Distance: Approx. 7 meters/23ft.Package List:1 x Transmitter2 x Receiver1 x Connector1 x Base2 x Screw2 x Expansion Bolt1 x English User Manual