PRINZTRONIC IMP

9v (PP3 battery).

Display is 8 digits, red LED.

4 functions, %.

70 x 127 x 22 mm (2.8" x 5.0" x 0.9").

Made in Japan.

The label embossed on the rear of the calculator reveals the actual manufacturer and model designation:
"UNITREX mini 8

EIKO BUSINESS MACHINE CO. LTD.
MADE IN JAPAN"