The alarm itself can be activated with the Skylink Keychain transmitter. When the alarm is activated, it will sound a piercing 110dB siren with a flashing LED light. You can also add an extra loud siren to this wireless unit easily.

• Operate as a main control unit with Chime, Instant, and Off Modes.
• Activated by keychain transmitter (See Remote Transmitters Above).
• Remote piercing 110dB 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 sensors.
• Can be used as a secondary or outdoor siren.
• Water resistant.
• Includes a piercing 110dB siren with flashing LED.
• Range up to 100 feet.
• AC power with 9V Alkaline battery backup (included).