Battery type: LR44/SR44 (x4) or CR1/3N (x2). Battery life: up to 120 hours.Maximum rider weight: 105 kg. Q-factor: 53 mm (55 mm with provided 2 mm washer). Stack height: 12.2 mm. This item is in the category "Sporting Goods\Cycling\Bicycle Electronics\Power Meters". The seller is "jepa_3162" and is located in this country: US. This item can be shipped to United States.