Dual button functionality, SM-01 uses two batteries (3 year+ life) and counts highest achieved rotor speed and accumulated revolutions. In addition it offers a physical strength challenge (30, 60, 90 seconds) - suitable for all Powerball models.
J**C
Original powerball counter
Replaced my powerball diabolo counter.works just fine.
Trustpilot
2 weeks ago
2 weeks ago
