Speaking prior to alarm.
Microphone & Loudspeaker available.
Various tones to choose from.
Visible and audible alarm synchronous (optional).
Several kinds of combination mode for choose.
Nice appearance, convenient operation.
Products description and application
Specially design for cabs of hoisting machinery (tyre crane, crawler crane,overhead traveling cranes,etc.), harbors machinery(gantry cranes, bridge crane, etc).