With the same feature set as the Gull wah, the Shafter is T-Rex's brand-new offering.
The idea here seems to be maximum adjustability, and that starts with three different wah sounds and a slope knob, which adjusts the sweep band for a more intense effect.
There's also a boost knob to drive things harder for more dirt and growl, and a hotspot switch for two different pedal sweep profiles.
With a variety of sounds to be had - some close to vintage wah sounds, some more extreme such as the vowel-like yoy-yoy - there's something for all players.
A wah for the 21st century, the Shafter's modern technology offers great versatility.