Dual counter keychain with no batteries No batteries required; operates in any weather condition Dual counters count up to 9 before resetting to 00 Includes a keychain for easy attachment to keys, bags, or lanyards Numbers eject automatically while pressing the buttons for quick visibility and use Compact, portable mechanical design suitable for everyday carry and simple operation Key benefits Reliable counting without power or charging needs, in any environment Quick, handson operation with visible numeric feedback Dual counters allow separate tracking tasks or simultaneous tallies Simple maintenance and durable, travelfriendly design Specification highlights Function: mechanical dual counters with reset behavior at 9 to 00 Compatibility: designed to clip onto a keychain or be carried on a keyring Size: compact keychain form factor (portable and easy to carry) Performance: immediate numeric advancement with automatic ejecting numbers on button press Use scenarios Event checkin or crowd counting at small gatherings: attach to your keys and quickly tally entrances or participants Inventory or shelf counting during stock checks: keep a separate tally on each counter for quick updates Classroom activities or games: use one counter for rounds, the other for scorekeeping, with fast visual feedback Notes No batteries required; mechanical operation ensures functionality in any weather Buttons provide immediate numeric changes with automatic ejecting numbers for clear readability