This cross-training machine, the Orbitreck Twister with Dumbbells, blends running, rowing, and skiing movements. It has handles that you can use for upper body exercises and a twister attachment that lets you work your core muscles. You can increase the resistance in your workouts with the dumbbells. Orbitreck Digital Computer Meter Brand Goal Initiative Maximum Pace, Duration, Range, and Energy Dimensions: 90*55*90 cm; Net/Gross Weight: 35.5/38.5 KG; Additional Twister: 2 dumbbells libra; 3 dumbells libra for the user.