[3D Glasses] Active Shutter RF 3D Glasses use RF to transmit signals, works without transmitter. Compared with the traditional IR signal transmission, the RF signal connection is faster and the continuity is more stable. Pack of 2, super saving Note: TV models earlier than 2012 are not applicable to this product. [Active 3D Glasses Compatible Devices] Active 3D Glasses shutter glasses are suitable for most 3D RF signal TVs and 3D projectors. Compatible 3D RF Projector: EPSON, Sony, JVC, xiaomi2, LeTV, Lenovo and others; Compatible 3D HDTVs: Epson, Samsung, Sony, Panasonic, Sharp, Toshiba, Konka, TCL, Haier and more. Can replace these 3D glasses models: TDG-BT500A, TDG-BT400A, SSG-5100GB, TY-ER3D4MU, AN3DG40 and more. [Easy to Use Projector 3D Glasses] Rechargeable design RF 3D glasses, with on/off switch. Auto 5 seconds standby and 5 minutes off. Non-disposable 3D glasses. High definition, no ghosting, no flickering, clearer and more stable than IR signal connection. Giving you a superior 3D visual experience [Quick Pairing PC 3D Glasses] When pairing, please make sure the distance between the 3D glasses and the 3D device is within 19.5 inches / 50 cm. Press the switch button, the green LED light will keep on for 3 seconds, the glasses are in the power-on state, then start pairing.