Total of 2 units, Stanley 3089 3089-13 310 MHz Garage Door Opener Remote Transmitters (Canadian Version). Vendor Description: Stanley 3089 / 3089-13 is a single-button visor remote control transmitter. Although this unit looks like the much more common 300 MHz unit, please note, this will only work on 310 MHz radio receivers most commonly associated with Stanley garage doors or automatic gate openers. Vendor Specification: - 310 MHz frequency gate or garage door remote transmitter - 10 dip switch programming, one (1) button - Visor clip, 9V battery included - Compatible with ALL 310 MHz Multicode gate or garage door systems - Replaces Multicode model 1089 310MHz 10 Dip Switch Remotes - Replaces MultiElmac 3089 - Dimensions: 3.75 x 2.5 x .875 inches Also included (FREE): 2 extra (compatible) SkyLink remotes.