R330B 
The Sparco R330B steering wheel is the same R330 steering wheel with built-in push buttons. These push buttons are water and dust resistant with an IP68 rating (1 meter for 60 minutes). The push buttons are wired separately so they can be used for “push to talk” communications or vehicle triggers. The R330B has a unique anatomic grip with a yellow leather centering stripe designed to improve comfort and driving precision. The R330B has a varied grip diameter that provides a better feel. The R330B is available in suede or leather with black cross stitching for added durability.