One of the challenges of using a power meter to pace your time trial effort is finding a way to mount your head unit to your handlebars. The stem is useless because it's too far back, and the base bars are useless because extension clamps and arm rests get in the way.
That's why Pioneer has the SGX-CA500 TT Computer Mount is something you need for your races against clocks, be they time trials or triathlons. The clamp fits the standard extension bar diameter of 22.2mm. The computer mount is rotated 90-degrees from normal, so you can read the unit normally, rather than tilting your head or mastering reading sideways.
The Pioneer SGX-CA500 TT Computer Mount works with the matching Pioneer cycling computer head unit only.