Digi 1st TC-880 Digital Pitch and Tally Counter;

Digi 1st T-880 Count Up/Down Tally Counter is an electronic hand tally counter that counts up from zero to 9,999 with large digital display. It can easily add or subtract numbers by switching between + and - mode. To save battery, its sleep mode automatically activates after 2 hours of inactivity. Operate with either loud audible beep to confirm every count or silent operation. Lock feature prevents accidental modification. Break-away lanyard prevents potential neck injuries.