This germ eliminating UV wand earned the best rating from the Hammacher Schlemmer Institute because it quickly killed 99.99% of germs and had the highest coverage area of any model tested. The wand uses the same UV-C light trusted to sterilize hospital instruments, and tests proved the device destroyed germs, bacteria, mold, and viruses after only 20 seconds--25% faster than lesser models. The unit's bulb measures 8 3/4" long--more than 2" longer than the model that placed second--ensuring faster cleaning of large surfaces like beds, sofas, and countertops. Scoring highest for ease of use, the best UV wand has a lightweight, slim design (1 1/4 lbs. and measures 1 1/8" diameter) for ease of maneuverability, unlike other units that were cumbersome and weighed over 2 lbs. The wand will only operate when the bulb is pointed downward and has a digital timer than can be set to turn off the unit after 5, 30, and 60 minutes. The best UV wand was the only one that did not create harmful ozone, thanks to its superior quartz bulb. Operates for up to two hours after a 12-hour charge. Includes a charging base that plugs into AC. 22" L. (1 1/4 lbs.)