850LM Door Operator Receiver Compatibility Guide: Remote Control Models: 811LM, 811LMX, 813LM,891LM,893LM,890MAX,,895MAX,892LT,894LT and all MAX remotes. Keypad Models: 877LM,877MAX. Antenna Extension Kit: 86LM,86LM. Compact design fits most doors and commercial door operators. The 850LM receiver features a multi-channel design: can be used as a single or three-channel receiver to control up to 3 doors or commercial door operators. The receiver can also be used with a 3-button remote to operate the open, close and stop functions on commercial door operators. The 850LM Commercial Door Operator Receiver can control multiple operators with one mitter: convenient access to gated communities, industrial facilities and commercial locations. Each channel is compatible with a certain number of remote controls and keypads: Channel 1 can program 50 remote controls and 2 keypads; Channel 2 can program 20 remote controls and 2 keypads; Channel 3 can program 20 remote controls and 2 keypads. We offer a variety of combinations: If you don't need 12V power, you can choose a separate 850LM door operator receiver; If you need power, you can choose a 850LM door operator receiver combination with power; If you also need 811LM remote control, we offer a combination of 850LM receiver, 811LM remote control (2-pack) and power supply, which can meet your more product needs. (If you need more product combinations, it be more beneficial). Easy to program: The product is packaged with a detailed user manual, which can help you complete the remote control programming of the 850LM receiver within 5 minutes. 160 feet signal reception range allows you to operate the door operator from the driver's seat. "No waiting" roll-in access. Colour:As Shown Material:Metal + Plastic Due to different batches, there may be differences in product appearance and printed text, which not affect use Package Contents: 1 * garage door receiver 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 +/- 1-3cm.