VP COK Sous Vide Cooker, a 4-step design for easy vacuum cooking. - Brand: VP COK - Model: 004503 - Type: Sous Vide Cooker - Cooking Method: Vacuum Cooking - Procedure: Easy cooking in 4 steps - Material: Stainless Steel You can cook roast beef and chicken at low temperatures. I have used it several times. There is no instruction manual. I was using it normally, but I haven't confirmed its operation. Thank you for viewing.