The Kangaroo Tri-Elite is an adjustable height desk that converts any ordinary desk into a sit-stand desk. It is identical to the Kangaroo Elite with the exception that it can accommodate three monitors instead of two (the Tri-Elite''s crossbar is hinged on both sides unlike the dual Elite). The unit is free-standing (no clamping required) and easily moved to any position on the desk. The main keyboard platform adjusts up or down with the assistance of a gas cylinder (or lift), making quick adjustments throughout the day easy and effortless. This platform is generous compared to most keyboard trays at 28" wide and 24" deep and can be adjusted up to 16.5" above the desk. With the "stopping bolt" feature, the user can raise the platform to a preset desired height every time. All Kangaroo models also include a stabilization leg to practically eliminate worksurface vibration.Monitors are attached to monitor mounts (or brackets) using the standard VESA plates requiring 75 or 100 mm hole patterns. These monitor mounts allow for panning, tilting, or rotating the monitors from landscape to portrait positions. In addition, the monitors can also be height-adjusted independent of the keyboard platform using a separate gas cylinder mechanism with a vertical range of 6.5").The Kangaroo Tri-Elite is recommended for monitors up to 10 lbs each (without stand attached) and not more than 22.5" wide (not diagonally but from side to side). For heavier monitors, customized units can be special ordered upon request.