MARATHON CO200001 Handheld Tally Counter with Finger Ring for Sports, Warehouse, Laboratories, Factories and Offices. Guaranteed for 100,000 Clicks MULTI-USE: Tally counter great for sports, laboratories, surveying and sports, walking/steps, counting number of visitors or guests at parties, celebrations, restaurants, bars, etc. LONG LASTING: Durable ABS plastic construction, smooth sleek service MAX COUNT  9999: Thumb-operated tally button begins count, while side knob quickly resets to 0000 RIGHT AND LEFT HANDED USE: Designed to easily fit and function for both those right and/or left handed MECHANICAL: No battery needed to operated