Specification:

Pressure sensing can easy use any kinds ink pen for counting.

Suit for Petri dish diameter 10-15 cm sliding adjust easy fix.

Number 0-9999 LED display auto zero reset button.

1.5X magnifier with swingable arm easy focusing.

Illuminator ring type fluoresce illuminator from bottom.

Sound certain the counting.

AC110/220V 50/60Hz

CE approved.