Introduction: A smart handheld fob, for use with YoLink siren products. Using Control-D2D device-to-device pairing, the SirenFob can be used to configure a standalone security system, including the fob, one or more sirens, and one or more security/intrusion detection devices. General Features: Four buttons, for controlling YoLink siren products Keyring loop (removeable) Battery-powered (two standard alkaline AAA batteries, included) LoRa long-range/low-power technology offers 2+ years battery life, compared to 1+ year for other brands LoRa long-range/low-power technology allows for up to 1/4 mile open-air wireless range Compatible with YoLink Control-D2D device-to-device pairing; can directly control compatible YoLink devices, like a Siren Alarm or Alarm Controller. learn more Please note: the SirenFob can operate without an internet connection and without a YoLink hub, making it ideal for standalone (for example, one siren and one SirenFob) applications, offline and off-grid application. But, the app will not function for the SirenFob in these cases, and no low battery level notifications will be sent, the device health (signal level, etc.) can not be checked, and firmware updates (product enhancements, etc.) can not be performed without a connection to YoLink hub and YoLink app account. Button Features: Siren activate button: turns on the paired siren(s), if not already on Siren deactivate button: silences the paired sirens(s), if they are activated/sounding Disarm button: pressing this button prevents the siren from activating due to the activation of any paired security devices (see Applications for more information) Arm button: after pressing the arm button, the siren(s) will activate if any paired security devices trigger an alarm response What's in the box? (1) SirenFob (batteries included) (1) Quick Start Guide Warranty: Two Years