This is a replacement 'multi function switch.' It is compatible with the Cycle Analyst v3 WP ('WP' for waterproof).
It is mostly stocked as a replacement in case you need it. You cannot add this switch to a Cycle Analyst unless it has the new waterproof connector for it.
From Grin:
"CA3_MFSwitch for CA3-WPx
Multifunction Switch for CA3-WP, with On/Off Power, Up/Down Digital Aux Buttons, and Screen Toggle. 45 cm cable length.
Multifunction handlebar switch for CA3-WP devices. Has on/off power control, up/down digi-aux buttons to control assist or power levels, and button to remotely change the CA display and do trip reset. Hinged clamp allows for installation without removing grips and other hardware from the handelbar.
45 cm cable length."
