Brand new projector remote control, no programming, paring or setting is needed. Just install new batteries (NOT Included), it will work reliably. Compatible projector models: BenQ TH585 BenQ TH685 BenQ TH671ST Notice: Make sure there's no obstacle between the remote control and projector when operating the device. Warranty: Refund available within 30 days, replacement available within 12 months from order date.