How to inflate/deflate the air mattress? 1. Plug in 2. Set the firmness level and switch the control dial to "inflate". Switch it to deflate when you need to deflate it. 3. Switch it to "off" and done. Do I need to keep the air mattress plugged when it is fully inflated? No. Please unplug it from the electric outlet when not in use. Will the air mattress stay inflated overnight? Yes, the dual pump will keep the pre-set level. However, if you find your air mattress loses firmness, it could be the stretching out of the material and the temperature. Please inflate one more cycle and keep the temperature warm when that happens. What electrical voltage outlet works for the air mattress? 120 V AC outlet ONLY Do I need to use bed sheets on it? The bed has a flocked top, which is very comfortable to sleep in. Of course, any twin-size sheets can be used on the air mattress if you’d like. Comparison Chart Built-in Dual Pump Queen Buying Options Built-in Pump Queen Add to Cart EZ Bed Queen Buying Options Built-in Dual Pump Twin Buying Options Built-in Pump Twin Add to Cart EZ Bed Twin Add to Cart Customer Reviews 4.0 out of 5 stars 259 4.0 out of 5 stars 294 4.0 out of 5 stars 1,583 4.0 out of 5 stars 259 4.0 out of 5 stars 294 4.0 out of 5 stars 1,583 Price $152.99$152.99 $69.79$69.79 — $118.99$118.99 $55.99$55.99 $329.99$329.99 Pump Technology Built-in Constant Comfort Pump Built-in 120V Pump Built-in 120V Pump Built-in Constant Comfort Pump Built-in 120V Pump Built-in 120V Pump Dimension 78” x 60” x 18” 78” x 60” x 18” 80'' x 62'' x 24'' 75" x 40" x 18" 75" x 40" x 18" 78" x 40" x 21" Comfort Velvet Top ✔ ✔ ✔ ✔ ✔ ✔ Non-Slip Technology ✔ ✔ Sturdy Built-in Frame ✔ ✔ Sturdy Built-in Frame Heavy Duty Construction ✔ ✔ ✔ ✔ ✔ ✔ Accessory Waterproof Carry Bag Waterproof Carry Bag Wheeled All-in-one Case Waterproof Carry Bag Waterproof Carry Bag Wheeled All-in-one Case Weight Limit 500 lbs 500 lbs 500 lbs 350 lbs 350 lbs 350 lbs