QUIET OPERATION Powerful Motor Powerful Powerful motor lift system for adjusting the height smoothly. Beam Reinforcement Non-slip mat Effectively stabilize the table as you use it. Adjustable Length The crossbeam is also retractable from 36.6"-52.4" to fit different-size desk tops. Unique Flanks Design Get a larger support point and effectively reduce noise. CROWNFURN Standing Desk Frame And Electric Standing Desk Standing Desk Frame Add to Cart Electric Standing Desk Add to Cart Electric Standing Desk Buying Options Mobile Standing Desk Buying Options Customer Reviews 4.6 out of 5 stars 75 4.1 out of 5 stars 34 4.1 out of 5 stars 34 4.3 out of 5 stars 14 Price $89.89$89.89 $129.99$129.99 — — Color Black/White Black/White Black/White Black/White Desktop Size Desktop Adjustment 48 x 24" 55 x 24'' 25.5 x 15.8" Height Adjustment from 28.3" to 47.2" from 28.3" to 47.2" from 28.3" to 47.2" from 28.5" to 42.5" Lifting Support ✔ ✔ ✔ ✔ Electric Lift ✔ ✔ ✔ ✘ Height Memory ✔ ✔ ✔ ✘ Voltage 100V-240V 100V-240V 100V-240V N/A Lifting Speed 1''/s 1''/s 1''/s N/A Keyboard Tray ✘ ✘ ✔ ✘