UV LED light in the 360 to 400 nanometer range draws mosquitoes, gnats and no-see-ums from every direction, then a fan pulls them through a one-way gate into the bottom chamber, so there is no zapping noise and no chemical spray. Coverage reaches 1076 square feet, enough for a patio or a campsite clearing. A separate white LED rim lantern gives 3 brightness levels and a warm candle glow with 3 further modes for dinners, reading or late walks. The 3.7 volt battery recharges in 3 to 4 hours through the included 4 foot cable from a 5 volt 2 amp source, so the unit runs cordless wherever it hangs. IPX4 housing handles humidity and light rain. It measures 10 by 10 by 13.5 inches and weighs 2.8 pounds.