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Train your mind with this digital Japanese soroban; a solar powered calculator and time piece within one sleek credit card sized case.
Made of wood with a touch sensitive panel, there are two modes; calculator mode – use the touch screen like a soroban – this classic style of calculation will develop your mind and improve your calculation skills! 1-4 units in each column of the bottom section, +5 units in each column of the top section. The beads will automatically show the time in the same manner when you switch to time mode. Read the rest of this entry »