Discover BioWave DL-9200 Subsonic Harmonic Emitter. This unit attaches to ceiling joists with enclosed ratchet pulleys. NEW IMPROVED MODEL - MORE DURABILITY AND STRENGTH. It is plug and play- just plug into any wall socket. One machine will cover up to 1 acre. The DL 9200 will run either on 110V or 240V.It draws only 30 watts when running. We offer a one year comprehensive warranty on parts and labor. Waves are stopped by dense walls so they are contained in the growing area. Dimensions-36''x 12" x12" weight 37 Lbs.