Twin hydraulic cylinders. Standard forward and backwards rowing motion. 5-function exercise monitor with calories, counter, distance, tempo and timer modes. Simple T knob resistance adjustment. Deep padded roller mounted seat and over-size footplates with adjustable toe straps. Maximum user weight 110kg/17.2st. Size (H)65, (W)75, (D)133cm. Gross weight 17kg. Requires 2 x AAA battery, not included. Packed flat for home assembly.