Simple Dynamic Microphone 2 transistor Preamplifier Kit 9VDC [ Unassembled kit ]

Simple Dynamic Microphone 2 transistor Preamplifier Kit 9VDC [ Assembled kit ]

Lie Detector Game Funny Kit from 9VDC [ Unassembled kit ]

Condenser Microphone Kit with Pre-Amp 9VDC [ Unassembled kit ]

Electric shock game ( low power ) from 9VDC [ Unassembled kit ]

FM WIRELESS MIC 2 STATES 2 Transistor 88Mhz 9VDC [ Unassembled kit ]