Fully functioning, brand new and durable replacement remote control, works out of packaging | Well responsive to every key press, ensuring the projector operates as expected without any hassles | A perfect replacement to your old or lost remote control; less cost with solid quality and better usage experience | Requires 2 AAA batteries (NOT Included); For use with BenQ MH530, MH630, MH680, MS3081+, MS504, MS504A, MS506, MS507H, MS511H, MS512H, MS514H, MS517, MS517F, MS517H, MS521, MS521P, MS524, MS524A, MS524E, MS527, MS527E, MS616ST, MS619ST, MW519, MW523, MW526, MW526A, MW526E, MW526H, MW529, MW529E, MW571, MW571H, MW621ST, MW663, MW665, MW821ST, MX503H, MX505, MX518, MX518F, MX520, MX522, MX522P, MX525, MX525A, MX525E, MX528, MX528E, MX570, MX618ST, MX620ST, MX661, MX662, MX703, TH530, TH682ST and | TS521P, TS537, TW519, TW523, TW523P, TW526, TW526E, TW529, TW539, TX538 projectors; Warranty as long as 12 months (From Date of Purchase); professional and nice customer service: messages will be replied by well-trained support team within 24 hours