Caution: color: we ship according to the color of the first picture, in the package: If the quantity is not stated in the description, we will ship the item according to the quantity and model in the title.If the title does not have a quantity, it is 1pcs. Vr glasses 2pcs active shutter eyewear dlp link 3d glasses usb rechargeable for dlp link projectors compatible|3d glasses/ virtual reality glasses works with all dlp link projectors compatible with optoma/benq/sharp/acer/lg/samsung/mitsubishi and other series dlp projectors can't compatible with sony epson and other lcd projectors, not used for televisions adopts the newest active shutter technology, high definition and no flickering or crosstalk, super fast 144hz refresh rate built-in rechargeable battery, continuous working 45 hours after fully charged with usb, standby time 180 days auto power off function within 1 minute of turning off your projector , save energy and stable 1.Dlp link technology working mode,2.Micro-usb rechargeable 3.7V lithium battery,standby time 180 days, 3.Continuous working 45 hours,4.Super fast 144hz refresh rate. 5.Low-power design,can charge by usb.6.Compatible with optoma/benq/sharp/acer/samsung/mitsubishi series dlp projector 7.Excellent lenses offer bright and sharp 3d experience;8.Adopt the newest active shutter technology, high definition and no flickering or crosstalk,9.Auto power off function, save energy and stable. Ratio:1000:1+/-200 frequency:96/100/120/144hz working current:less than 1.2Ma work hours:45+/-5hr battery lifespan:0°c-45°c storage temperature: -10°c-60°c power supply:3.7V 80mah transmission:38%+/-2 response time:2ms+/-0.5Ms view angle:150° l/r 75° sync operation:white light dlp. Link work humidity:20%-80%rh atmospheric pressure:86kpa-106kpa colour:blue material:plastic size:163*42*170mm package contents: 2*active shutter eyewear 2*usb charger cable warm tip: if you cannot make sure if our glasses can work with your projector, there are 2 ways to confirm it 1:the 3d signal receiving window can receive the dlp-link signal. As soon as you use 96-144hz dlp-link 3d projector and connect thru 3d ie source,our glasses can work perfect with your projector. 2:Or if your projector has the logo of "dlp 3d ready" below, our glasses also can work only the above package content, other products are not included. Note: light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.