Description On Display/Demo in 8 Sony & JVC Theaters At Our New Huge Building Where We Built 18 Luxury Cinema Demo Rooms 3D Lite RF active glasses Rechargeable battery (cable included) Battery life more than 40 hours Foldable arms. Shuttering frequency 96-240 Hz. We Also Have XPAND VISION AE125-RF 3D RF Emitter  – Power on/off light, green color represents the power LED. When lit power is ON.  – Power Connector: 12VDC  – Reverse Push-button: RF sync signal can be reversed with suppressed push-button.  – Sync Connector: BNC synchronization signal connector input.  – Sync LED: Yellow color.  – When OFF there is no sync signal present.  – When sync signal is present LED will be On & will blink according to sync signal frequency.  – RF/Bluetooth Emitter, Mid-Range, VESA standard input, HFR Compliant 96Hz – 240Hz. X105-RF-X1 Pairing Procedure: First set the projector to run some 3D content. Then with glasses in hand move to within 2-3 feet of the RF emitter. The purpose being that there are a lot of RF signals in a typical house including your cell phone. So you want to be close to the device in order to better insure you are pairing to the correct RF signal. I hold the glasses in my left hand so I can see the LED( partially closed temple piece) and be able to turn on the glasses with my right thumb. (Please note that the pairing operation I describe below begins immediately after you turn on the glasses.  It is one continuous operation) Press the on/off button & observe the LED quickly going from dim to bright, press & hold the on/off button & slowly count to 7 & then release the button. Observe the LED near the end of the count to 7 and note the LED will flash 6 times quickly to indicate that the glasses paired to something. Confirm the glasses are working in 3D by viewing the 3D movie.