The DGYF 500A is a portable induction sealing machine that uses the electromagnetic induction principle to produce instant high heat, melting aluminium foil so it adheres to the bottle mouth for a leak-proof, mildew-proof seal that extends preservation time. It has a box control unit marked DGYF-500A with two digital displays marked S and V, arrow keys and a hand-held sealing head on a cable. It seals diameters of 20 to 100 MM at 0-50 PCS/Min, for pharmaceuticals, pesticides, lubricants and cosmetics.