Twisted Minds Mechanical Spring Monitor Arm - Black (TM-26-C06)2 easily accessible USB 3. 0 ports Built in Spring Tension Gauge: for perfect weight adjustments Easy to adjust, no tools required Free Tilting Design: for multiple monitor viewing angles Two Mounting Options: both desk clamp and grommet are included Aluminum Construction: provides a sleek, lighter, and elegant look Detachable VESA Plate Design: enables easy installation Freely Adjusting Height: for an optimal ergonomic position Gas Spring: perfectly