SkyLink Wireless Home Security Systems Audio Alarm model AA-433
Operate as a main control unit with Chime, Instant, and Off Modes.
Activated by keychain transmitter (4B433A).
Remote piercing 130dB siren with flashing LED. Adding an extra loud siren to the system is easy with this wireless unit. You can add one or more of these units anywhere within the transmission range of the system console Works in conjunction with up to 15 remote sensors. Can be used as a secondary or outdoor siren.