When the secured area is breached, Express GSM-2 calls and sends text message to your phone. Pairs up with the loud wireless siren "PRISMA-S" (sold and purchased separately).
• Stand alone security system. Operating independently
• Arms and disarms via a keychain remote control
• Sends the alarm directly to your phone
• Connects to the loud (optional) "PRISMA-S" siren
• Operates on a single battery for up to six month
• Operates in a temperature range of 14 to 122 °F (-10 to +50 ℃)