Decoder IC - Rolling Code. Frequency - 433.92MHz. Operating voltage - 3V DC CR2032 Transmit distance - 25-50m in open space. Open space means no any interference. No walls, no doors, no trees or any other obstructions. Interference like garage door or brick wall can reduce remote control range significantly. Make sure your remote control is exactly the same brand and same model from our compatibility list. If it is not same, please don't buy. Compatible with: 84330E, 94334CE, 94333E, 94334E, 94335E, 9747E,1A5639-7, 1A5477, 1A6487, 132B2372, D-66793, WICKES156105, 84333E, 84335E, 8747E, 84330EML, 84333EML, 84335EML, 8747EML, 94330E, 94330EWK, 94330EML, 94333EML, 94335EML, 94334HD, GC844, CG844, C840, C940, C943, C945, CM842, CM844, CM128 Garage Door Openers: ML700, ML750, ML850, LiftMaster LM5580, LM600, LM800, LM1000, RDO, Chamberlain GPD60 Gate Openers: ART300, LYN300, LYN400, SUB300, SCS300, SLY300, SLY500, SLY1000, SLY1500, SLY1800. Access to receiver required. Please make sure you got access to your receiver/opener before purchase. Don't confuse some models comes in few different frequencies and coding. Make sure frequency is correct 433.92MHz. and model number start from 8 or 9. Look to first picture. How to use our remote control 1) Press the programming button on your motor. The LED will go on. 2) Press desired button on the remote control. 3) The opener light will flash, confirming successful programming. Now the opener will operate when the remote control push button is pressed. To erase all codes from the receiver, hold the receiver's Learn button until the indicator light goes off (after 6 seconds). All codes that the receiver has learned will be erased. Color: Black Material: plastic Package Contents: 1 * Door Remote Control Only the above package content, other products are not included. Note: Light reflection 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