Whether you"re into electric planes, helis, cars, boats, or other models, you need to know how your electric power system performs under actual operating conditions. This V4 version of the 150A MicroPower eLogger from EagleTree comes with pre-installed wires so that you can use the best type of connector for your system and has a good portion of the features used on its cousin, the Eagle Tree Data Recorder, at a price point that makes it more accessible to the average hobbyist. The MicroPower V4 system comes with everything you need to log current and voltage, right out of the box (logger, USB cable, CD, instructions). Logs pack current to +/- 100 amps and voltage from about 5V to 80V and current is measured with a true Hall Effects Sensor - NOT a resistance shunt, which produces heat and sucks power from your system! Adjustable logging rate (from 50 samples per second to one sample every 5 minutes) 16 times the logging space of the standard eLogger V3, and lossless data compression. Typically logs all available sensors for about four hours, at 10Hz. All data is logged to permanent memory, which retains the data even when the power is removed. Fully compatible with our OSD Pro expander and includes Y cable for throttle position logging. Great for bench monitoring of battery charging also! Supports the PowerPanel LCD Display. Accepts optional inexpensive sensors for three Temperatures, RPM (brushless, magnetic or optical), Airspeed, Altitude, GPS, Servo Current, and more! Software computes Wattage, mAH, etc. for complete e-flight data. Fully compatible with Windows 7 (32 and 64 bit), Vista, 98SE, ME, Win2K and XP. Weighs about 0.8 oz (22 grams). Versions with Wire Leads may weigh slightly more. Comes with our state of the art Windows virtual playback display and graphing software. Powerful Graphing software has advanced charting features such as amps vs volts. Internet Updatable firmware - as new features are added, the update is just a download away!