Chamberlain Hurlift 1A5639-7 Garage Door Opener Remote Control D-66793 for Liftmaster Merlin + C945 C943 CM842 - Grey Button. Purchase Information: We know you have a world full of choices, thank you for choosing us! Before ordering, please note that our remote control is a COMPATIBLE/REPLACEMENT/COPY/CLONE remote control, not the original. Please ensure your original remote control is compatible before purchasing. As a general guideline, if the remote control you are currently using is one of the remote controls shown in the picture, this remote control will be compatible with your remote control. If you are unsure, please do not hesitate to contact us. Compatible list: C945, CM842, C940, C943 MR60, MR600, MR600A, MR650, MR800, MR800A, MR850, MR1000, MT60, MT60P, MT230, MT600, MT800, MT1000, MT3850, MT5580, MT5580P, MR850, MR1000, MGL300, MGL400, MGS300, MGS500, MGS500T, MGS1000, MJ3800, MJ3800R 84330E, 94334CE, 94333E, 94334E, 94335E, 9747E, 1A5639-7, 1A5477, 1A6487, 1A5478, 132B2372 D-66793, WICKES156105 84333E, 84335E, 8747E, 84330EML, 84333EML, 84335EML, 8747EML 84330E, 84333E, 84335E, 8747E, 84330EML, 84333EML, 84335EML, 8747EML 94330E, 94330EWK, 94330EML, 94333EML, 94335EML, 94334HD Reference: 94330E, 94333E, 94334E, 94335E, 9747E GC844, CG844 001A6518, 1A6518, PS94331 500, ML500 700, ML700 750, ML750 850, ML850 HC260ML (HC-260 ML), HC280 (HC-280), HC100ML (HC-100 ML) HC300ML (HC-300 ML) HC400ML (HC-300 ML) HC500ML (HC-300 ML) HC600ML (HC-600 ML) LM600, LM-600, LM600A, LM-600A, LM800, LM-800, LM800A, LM-800A, LM-1000, LM1000A, LM-1000A How to program: 1) Press the programming button on your motor. The LED will light up. 2) Press the desired button on the new remote control. 3) The opener indicator light will flash, confirming successful programming. Now the gate opener will work when you press the button on the remote control. To delete all codes from the receiver, press and hold the learning button on the receiver until the indicator light turns off (after 6 seconds). All codes receiver