This Oxalic Acid Vaporizer uses a naturally-occurring acid that does not harm bees, but is deadly on varroa mites! Features a built-in-timer and an automatic-off function. The oxalic acid cup is made of 235-watt cast aluminum. Be sure to wear a respirator, safety glasses, and gloves! Requires a 12 volt battery. Oxalic acid and battery not included.