Have a bunch of oscillators or crystals and are unsure what is good or defective?

The OSCILLATOR AND CRYSTAL TEST SET Module has socket pins / patterns

for thru hole and SMTdevices.

3.3 & 5v switch is for oscillators of both voltages.

osc / xtal switch selects which type of devices to test.

6 digit frequency counter module is mounted via 4 standoffs.

Wall adapter is included.

MADE IN USA WITH LIFETIME WARRANTY