What is the voltage of the standing desk frame I purchased? The applicable range is 100v-240v, 50Hz/60Hz, 1.5A Do the desk frame accessories include screws for fixing the desk? Certainly, our table frame accessories include screws for securing the desktop. You won't need to purchase them separately. Can you add wheels? Yes, of course, the wheel specifications are M8 (8mm specification) Compare data Single Motor White Add to Cart Single Motor Black Add to Cart Dual Motor White Add to Cart Dual Motor Black Add to Cart Customer Reviews 4.5 out of 5 stars 14 4.5 out of 5 stars 14 4.5 out of 5 stars 14 4.5 out of 5 stars 14 Price $89.99$89.99 $89.99$89.99 $169.99$169.99 $169.99$169.99 Constant speed lifting ✔ ✔ ✔ ✔ Motors Single Motor Single Motor Dual Motor Dual Motor Silence-dB <45dB <45dB <45dB <45dB Support Tabletop (Min) 39" x 20" 39" x 20" 44" x 20" 44" x 20" Support Tabletop (Max) 63" x 28" 63" x 28" 72" x 28" 72" x 28" Load Capacity 176lbs 176lbs 265lbs 265lbs Adjustable Height 28" - 47" 28" - 47" 28" - 47" 28" - 47" Lifting Speed 0.8inch/s & 2cm/s 0.8inch/s & 2cm/s 1inch/s & 2.5cm/s 1inch/s & 2.5cm/s Applicable Voltage 100-240V 100-240V 100-240V 100-240V One-Touch Height Adjustment 3 Memory Preset 3 Memory Preset 3 Memory Preset 3 Memory Preset