[Outstanding features] 3D glasses use the latest active shutter technology, 144Hz ultra-fast refresh rate, leading the level of other 120Hz or 96Hz products. It is also a rechargeable 3D glasses with an ON\/OFF switch. Not disposable 3d glasses. High-definition,no ghosting, no flicker, to provide you with an excellent 3D visual experience [2D to 3D function] Our 3D glasses have a 2D to 3D function. If you turn on and pair our active 3D glasses, but you dont see the 3D effect, just click the volume up and down switches on the remote control panel, and then press the switch in the middleof the glasses to flip the left and right eye views. To get a better 3D experience. [Easy to operate] Simple one-button operation, automatic 5-second standby and 5-minute shutdown, including detailed user manual. Very convenient, no need to operate the dlp projector. Active shutter 3d dlp glasses have a built-in large-capacity rechargeablebattery. After the USB is fully charged, it can work continuously for 45 hours, and the standby time is 180 daysThe ZYSD team is at your service and we hope you enjoy your life