THIS IS A 3 IN 1 SOLDERING THAT IS DEISGN TO USE GAS FOR WELDING SOLDERING, HOT BLOW, BLOW TOECH, IT IS A WALL DEISGN SOLGERING IRON THAT DOSE NOT USE ELECTRIC ONLY USE GAS ALL U NEED TO DO IS TO REFILL IF WHEN IT,THIS IS A NEW TECHNOLOGY THAT USE ONLY GAS. D0 NOT PUT IN THE PLACE WHERE THE SUNLIGHT CAN SHINE ON DIRECTLY OR THE TEMPEATURE IS OVER 60C, DO NOT DRILL OR HIT STROGLY THE GAS TROUGH, WHEN IGNITING AVOID BODY OR FACE TO DOSE . DONT DRILL OR THD PLACES WHERE NEAR FIRE, HEATER OR COMBUSTIBLES. AFTER FINISHED, SWITCH OFF PROPERLY, STRICTLY FORBID TO ADD GAS WHEN USING, BUTANE AT THE BOTOOM OF THE SOLDERING IRON IT HAS A REFILLING POINT WHERE U CAN FILL THE GAS, THIS PRODUCT IS SUTABLE FOR PEOPLE WHO GO FOR OUTSIDE WORK U DONT NEED TO WAIT FOR LIGHT OR ELECTRIC GENERATOR POWER SUPPLY TO DO YOUR WORK. It doesn't come with gas note please u can go on YouTube and see how u can refill it.