The first non-crankset power meter from SRM, this one sits inside a pedal spindle manufactured by Look. Careful design and integration mean that the pedal's profile is pretty much the same as that of a regular high-end pedal, and it is only slightly heavier too. Recharging is performed using a hex-shaped adapter that plugs into the crank end of the pedal spindle, allowing for simple USB charging. It's jus as well that recharing is easy, as each pedal apparently only lasts around 90 hours of use.
Manufacturer website: Look/SRM