Blazon/3 supplements any intercom station call light with a bright visual signal and an switchable loud audible signal. The low-current strobe is roughly the equivalent of three belt packs allowing the Blazon/3 to be powered by the intercom supply alone. The audible alert may be switched from constant to pulsing to off. Triggered by any signal lamp button on the same circuit, an internal timer sustains the signal for 3 seconds. Loop-through male and female XLR-type jacks on the back panel allow the Blazon/3 to be connected to the system exactly as is a beltpack.