Lightinthebox Quad-Band GSM Home Burglar Security Alarm System w/ Detector Sensor Kit / Remote Control Dimensions (L x W x D, mm): 326Lx250Wx72H mm(12.83Lx9.84Wx2.83H inch) Receiving Frequency: 433MHz Wireless Zones: 100 Wired Zones: 8 Pakage Contents: Door Entry Contacts, Power Adapter, Remote Controller, Infrared Detector, Main Panel