65W USB-C Port Ergonomic Seating Made from Recycled Materials 48" to 60" Desktop Choices The Space Grey Power Generating Ampera meets our innovative Omni Desk. Get the whole package when you add this bike desk duo to your office. Equipped with multiple ways to charge your devices, you’ll never run out of juice. At a speed of 60 rpm, the Ampera is capable of producing 65 watts per hour at any given resistance level between 1-4. Pair this luxury bike with either a 38", 48”, 51" or 60” standing desk with your choice of frame and desktop material.