RC Electronics "Watt's Up" Watt Meter and Power Analyzer measures eight parameters key to electric power safety & performance. Use it to: Prevent peak currents damaging to battery, motor control, motors, wiring, and connectors. Verify sufficient operating voltage under load. Set cutoff voltages, and check battery capacity & health. Balance battery cells. Confirm proper battery charger operation. Detect stalled servos. Compare and select components for best performance and much more!*Flat Rate shipping is for the lower 48 states only.