works great! i use it to change my flight recorder into an on road recorder. expands my v2 logger to record throttle position and motor rpm, very useful for my drag car.A must have expansion for your V2 logger!!! the wire rpm sensor is much easier to install than the other.The engineers dream when using V3 data logger. Allows you to expand to read motor and battery pack temp. Two essential measurements when pushing the edge on both.Very good quality, installation instructions, free postage (very quick). My personal rating: 6 stars - unfortunately max. 5 is available :)Very nice product, now I can meassure RPM without installing additional sensors in the model. It's enough to connect one of the cables in most cases! And this very thin cable does not need to carry "high amps" which makes it very easy to connect.