Features

     Two-way communication
     Allows control of the security system
     Four buttons: Arm / Disarm / Start / Panic
     Front sliding cover prevents inadvertent use
     Durable and scratch resistant buttons
     Lightweight keychain design
     Low battery detection
     Suitable for home automation and security installations
     Meets UL1023
     Certified EN50131 Grade 2, ClassII

Specs

     RF frequency: 868MHz
     Power supply: 1 3V CR2032 lithium battery
     8 year battery life
     -10 ° C ~ + 45 ° C operating temperature
     Relative humidity up to 85% (non-condensing)
     Dimensions: 50 x 30 x 15 mm