Fully functioning, brand new and durable replacement remote control, works out of package | Well responsive to every key press, ensuring the projector operates as expected without any hassle | 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 Optoma EW631, EX530, EX532, EX542, EX550, EX551, EX605ST, EX605ST-EDU, EX610ST, EX610ST-EDU, EX615, EX631, FW5200, FX5200, HD66, PRO800, TH1020, TH1060, TH1060P, TS551, TS725, TW610ST, TW610STi+, TW6153D, TW631-3D, TW675UTi-3D, TW695UT-3D, TW695UTi-3D, TW762, TW766W, TX540, TX542, TX5423D, TX551, TX610ST, TX6153D, TX631-3D, TX665UTi-3D, TX665UTiM-3D, TX7155, TX735, TX761, TX762, TX763, TX765W, TX766W, TX779, TX779P-3D and more 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