The operating instructions for this item are not available online. There is no parts listing for this unit so the hard copy cannot be ordered as a replacement part. Although I cannot see the controls on this particular model, you may be able to use these general instructions:
The control will normally have a SEAL button that can be used on one end of a cut-to-fit vacuum seal bag. Place one of the unsealed ends of the vacuum bag in the sealer and press the SEAL button. This will seal one end of the bag.
Place the item in the bag that is sealed on one end.
Select the speed and food type settings.
Place the unsealed end in the sealer.
Press the VACUUM and SEAL button to remove air from the bag and seal it.
These general instructions would work for most vacuum sealers. I hope that it is helpful for your model.