Description: Prevents peak currents damaging battery, ESC, motors, wiring and connectors. Verifies sufficient operating voltage under load. Individual cell balancing. Set cutoff voltages, check battery capacity health. Confirms proper battery charger operation (connect between your battery and charger) Detect receivers and actual operating current so as to make sure whether an UBEC is needed. Blue backlit LCD display. Specification: Operates voltage: 4.8 V-60 V OV with optional auxiliary battery. Dimension (L * W * T): Approx. 80x40x22mm / 3.15x1.57x0.87inch. Size Chart: Measurements: 0-150A, resolution 0.01A; 0-60 V of resolution 0.01 V; 0-6554 W resolution 0.1 W; 0-65Ah, resolution 0.001An; 0-6441Wh, resolution 0.1Wh; Backlit LCD screen Package Includes: 1 Piece Watt Meter and Power Analyzer 150 Amps 1 Piece User's Manual