The BioWave DI 92000 subsonic harmonic wave machine has been proven to create more yield in vegetables and fruits. This small indoor unit creates subsonic harmonic waves that resonate with plants and causes them to breathe better, grow more rapidly, resist diseases, and produce larger yields. Designed for hydroponic and greenhouse applications, it covers one acre or 43,560 square feet. The DI 92000 will run either on 110 volts or 240 volts. It draws only 30 watts when running and attaches to ceiling joints with ratchet pulleys. Once it is ceiling mounted, all you have to do is plug it into a 24-hour timer (sold separately) and watch your garden grow.