3D glasses for Sharp Quattron 3D Televisions.Features liquid crystal shutter and rechargeableLithium ion polymer battery which can be rechargedvia USB terminal of a Sharp TV. 30 hours ofcontinuous use between charges (charging time is90 minutes). Stylish black frames.Specifications Lens Type : Liquid Crystal Shutter Power supply : DC5V (Supplied by a USB terminal of a Sharp TV) Battery : Lithium ion polymer rechargeable battery (DC3.7V 70mAh) Battery life : Approx. 30 hours of continuous use*1 Accessories included : Cloth bag x1, Glasses cleaning cloth x1, Nosepad (Large x1/Small x1), USB cable x1 Dimension ( W x H x D) : 175.5 x 43 x 170 mm Weight : Approx 40 gram Operating Temperature : 10°C to 40°C*2