Press the POWER, the LED shows green means battery is sufficient, the red suggests the time to charge.

The PROBE socket is for connection to the probe.

The SD Card slot is for a SD memory card that stores the images.

The CONTRAST rotary switch is a multi-functional:

• rotate left to store the current image

• rotate right to switch between 200x and 400x magnifications

Press down the CONTRAST to enter the menu, which allows to access:

• the contrast, brightness, color

• the launguage

• the time and date

• the Format for the SD card

• the software version etc. 

Press down to nevigate and rotate left or right to increase or decrease the values.