Device Memo Trainer M27961 is designed to train the memory of Soviet pilots, cosmonauts and intelligence personnel.

Instruction
1. Switch on the instrument tumbler
2. Press the button START
3. Push buttons with red numbers from 1 to 15 in order increasing and with the blue from 15 to 1 in descending order, alternating between them.
Starting with the reds: 1 red, 15 blue, 2 red, 14 blue etc.
4. The device automatically detect the number of errors and time assignment on indicator
5. An excellent result if the test passes without errors less than 40 seconds. A good result is the time to 60 sec with one mistake. More time requires additional training.
6. ?fter the test, turn off the power

The device is made with reliable components and can be used in field conditions

Note
The power may fail. Problem eliminated slight blow to the body of the device.