Features: 1.The heat sealer does not need preheating, quickly seal bags for food preservation. Suitable for coated aluminum foil bag and PP/PE/PVC bag less than 3.2 mm thick. Not suitable for pure paper bag, pure aluminium bag and super thick bag with oil. 2.3 Modes to Adjust the Temperature -- Mode① for super thin bags not thicker than 0.02mm; Mode② for almost any common bags (not thicker than 0.13mm); Mode③ for extremely thick bags not thicker than 0.32mm. The default mode is mode 2, daily use for sealing bags, please use mode 3 for common bags. 3.Charging via USB interface, a USB charging cable is included in the package. 4.Quick sealing and cutting plastic bags. Turn knob to "+" position to seal, turn knob to "-" position to cut the plastic bags. 5.A magnet is built in the back of the mini bag sealer, the bag sealer can stick to the refrigerator. Small size and long standby time, portable to carry out.