Emergency alarm two-way radio remote activation transmitter, task/design - GF82.25-P-4111T

MODEL 211 with CODE (934) Taxi emergency alarm unit 

Fig 1: Identifying Taxi Emergency Alarm Two-Way Radio Remote Activation Transmitter Components

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Emergency alarm two-way radio remote activation transmitter, task	GF82.25-P-4105-01T
Emergency alarm two-way radio remote activation transmitter, design	GF82.25-P-4111-03T