Keep your home safe with the Secure Alarm System Starter Pack from Nest. This system features the Nest Secure Guard, which serves as the security base station. It is equipped with an 85 dB SPL siren to deter intruders. The Guard's built-in keypad is ideal for those who prefer to arm and disarm their system with a passcode. In addition, you could also arm and disarm your system with one of the included Nest Secure Tag devices, or via the free Nest app available for iOS and Android devices. The system supports up to 10 Tag devices, making it possible to give them to children, family members, and other loved ones.