In Stock! INNOVV K2 DUAL Channel 1080P/1080P Motorcycle Cameras, WiFi, GPS, SONY Exmor Sensors, Waterproof, Alluminium DVR Housing

I have the 2 camera version of the A129 (aka A129 Duo) and it works fine with a U1 class card. So it would appear a U1 card is plenty for the K2 system.

40 Mbit/s is only 5 MB/s, so you could double the bitrate again (40 Mbit/s per camera) and a U1 card would still suffice.
 
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