Specifications: Portable sealing machine Material: ABS and Food Grade Color: Gray Size: 14.4*4*3.5mm Weight: 46g Voltage: 3V Power: 3.5W Thermal efficiency: 90% Use battery: 2 AA batteries. The batteries are not included Function: Use for snack food saver storage and create airtight containers, make food fresh Package Included: 1 x Heat bag sealers How to use: -When use the bag sealer, equip it with the battery. Please install the battery according to the positive and negative instructions under the battery case or it won't work. -Before use it, preheat 10~15 seconds(press without things) -Put bags into heat sealer's opening and do press, at the same time, drag the bag's seal move slowly from one side to another side of the bag. Control the press force according to the thickness of the bags -You must let safety lock cover up when you do not need it. And you had better to take off batteries from heat sealer capper Tipes: -Do not press when pressing, otherwise it will cause the metal contact piece deformation does not heat. -The bag to be sealed must be kept clean, do not have water, oil and other stains. -The sealer has a high requirement for the battery, so it is better to use a new high quality battery, old low quality battery may be not work.