Prinztronic Countdown

3 v (2x AA batteries).

Display is 8 digits, red LED.

4 functions, %, memory, timer.

72 x 124 x 19 mm (2.8" x 4.9" x 0.75").

Made in Taiwan, Republic of China.

This model has a timer, for eg. showing the cost of telephone calls as they are made. When the "C" (for Count) switch is set, whatever value is on the display then is added to the display every 0.1 second.