Platinum v4 serial products allows the motor to start extremely smooth and avoids tail-drift issues that helicopters experience. The start-up time is adjustable from 8 to 25 seconds, this will definitely create a perfect starting point for every flight. High-performance 32-bit processor with a running frequency of 72mhz combined with advanced algorithm optimizes the speed governing. Together with the adjustable governor parameters guarantee every pilot a precise control experience. The built-in switch mode bec with an adjustable voltage range from 5v to 8v, a continuous current of over 10a and peak current of 25a can supply enough power for your servos to operate efficiently. This platinum v4 esc has “brake disabled, normal brake, proportional brake and reverse brake” four brake modes. The brake amount is adjustable in normal brake mode; in proportional brake mode, the brake force will be automatically allotted based on the position of radio throttle stick; in reverse brake mode, the motor rotation can be changed via a spare transmitter channel. Multiple protection features include esc thermal, capacitor thermal (hobbywing-patented technology), esc overload, throttle signal loss(or fail safe), and low voltage cutoff effectively prolongs the service life of the esc. The built-in arc proof circuit effectively eliminates arc/spark produced at the “powering-on” moment and prolongs the connectors‘ lifespan. Hobbywing platinum 120a v4 features: super soft start-up high voltage built-in bec excellent motor speed governing deo technology built-in sparkproof circuit four brake modes multiple protections upgradeable esc firmware spec check: brushed/brushless: brushless cont. /peak current: 120a/150a input voltage: 3-6s lipo bec output: switch mode:5-8v,10a input wires: red-12awg-150mm*1/black-12awg-150mm*1 output wires: black-12awg-100mm*3 input connectors: no output connecotors: 4. 0mm gold connectors (female) lcd program box: supported wifi module: supported size: 84. 3x38. 2x20. 4mm weight: 107g (hw30203401)