Dual Station Intercom Kit (transistor)

A mini dual station intercom kit that can be used at as a security at your front door.
Two loudspeakers of 8 Ohm 0.25 W are provided.
Station selection: By sliding switch.
Power requirement: 4.5 - 6 VDC.
Consumption:
8 mA max. (standby) @ 4.5 VDC
50 mA max. (working) @ 4.5 VDC
PCB dimensions: 1.95 x 1.31 in.
Recommended housing: Future Box (FB03)