Deluxe Onboard Watt Meter Measures all the electrical parameters of your power system during flight so you can increase your system's performance Records peak amperage reading during flight so you know the "real" amp draw of your power system Measures energy (Wh), charge (Ah), power (W), current (A) and voltage (V) Measures peak Amps, peak Watts, voltage minimum (sag), and peak temperature Extremely compact and lightweight so it's easy to install of your aircraft and won't weight you down