With a rechargeable design, this shutter eyewear is very energy efficient and eco-friendly. Besides, it can fit your face well and will not cause pressure to your nose, so you can use it with confidence. Adopting a head-mounted design, this shutter eyewear can free your hands and is very convenient. Besides, it supports 3D technology, which can provide you with a different viewing experience. It is constructed of ABS material. The length of this product is 17cm, the width is 15.8cm and the height is 4.6cm. It can make you enjoy 3D movies even at home. Item Name: Shutter Eyewear Material: ABS Features: Ergonomic, Multifunctional, Rechargeable Contrast Ratio: 1000:1+/-200 Synchronization Frequency: 96hz/120hz/144hz Viewable Angle: 30 Degree (L/R15 Degree) Operating Current: