In order to arm and disarm the EXPRESS GSM 2 of EXPRESS E3 devices, a three-button keychain remote control is used.

Product Description

Each home alarm motion detector can have up to five extra remote controllers. Remote control battery type is lithium CR2032 3V. Communicates with the alarm devices via radio channel.
Button ‘‘ is used for arming the device;
button ‘‘ – for disarming the device;
and button ‘*’ serves for balance request or coming out of the programming mode.