This is the tabletop device that repels mosquitoes within a 110' radius for up to 40 hours. It sits unobtrusively on a patio table or picnic bench and automatically emits a safe repellent free of DEET or citronella fragrances. Eliminating the need to apply chemical-based sprays or scented candles that can alter the taste of food, it simply uses internal heat to diffuse an odor-free repellent. The unit can plug into AC for continuous protection or hold a six hour charge when away from an outlet. With an automatic shut-off timer. 3 1/2" H x 3 1/4" W x 2" D. (12 oz.)