Step 1: Plug in the power supply and press the fourth button on. Step 2: Press the first key to adjust the power cycle from 1-5. 1-5 gear power is 500w, 600w, 800w, 900w, 1000w. Step 3: Press the second and third buttons to adjust the sealing time, respectively for the ones and tenths of the seconds Step 4: Place the mouth of the bottle with aluminium foil in the centre of the bottom of the machine, press the switch on the top of the handle, and the machine automatically starts sealing. If the sealing diameter is less than 25/32"(20 mm), the power should be set to a high level, which can increase the sealing speed. If the sealing diameter is longer than 2 23/64"(60 mm), the power should be set to a low level to obtain better sealing quality. Just after sealing, press the bottle mouth with fingertips would make the seal more firm. There is no certain time and power, please adjust several times according to the actual situation to obtain suitable setting parameters.