ONPAK, its design is easier to see a welding spot. As the hand piece is deep, you can use it in a wide range. It is light and easy to use. Just like a stapler. Ideal for PS and PET box for spot welding, and there are no more materials to be wasted, such as staples, tapes andrubber bands etc. Can also be welded of poly bags, film sheets, cloth products and ribbon products etc. Specification Model: ONPAK Voltage: 110V / 220V Oscillation Frequency: 57kHz Power: 20W Max. Consumption Electric Power: 40VA Timer: about 0-5Sec. Machine Dimension: Main Unit(L*W*H):125*170*53mm Hand Piece: 28*122*54mm Length of Power Cord: 1.5m Length of Connector: 50cm Machine Weight: Main Unit: 1kg Hand Piece: 200g Suitable Material: PS, PE, OPP, PVC, OPS, PET