Rocelco MA1 ? Single monitor Arm with GPCMA (Gas Piston Counterbalance Motion Assist) allows effortless adjustment for comfortable viewing. Fits a 13"-27? screen up to 14.3 lbs. Includes USB and multimedia ports to conveniently connect and charge your devices. Quick installation and adjustment - no tools required. Cable channels provide a hassle-free way to run your cables and maintain a tidy uncluttered workspace. Includes two mounting systems to attach to your desk - clamp and grommet.