This is an electronic meter cap that fits all 3/4″, 1″, 1 1/2″, and 2″ meter assemblies. Note that this is just the cap and does not include any wiring. It comes with an O-ring (#13847).
Meter Cap is commonly used with valve models 2750, 2850, 2900, 9000, 9100, and 9500, as well as with the XT or 3200 NXT timer/controllers.