The Hobbywing Platinum Pro 120A-HV 120 Amp ESC is a great choice for 600/700 class 3D helicopters, 5-8kg large scale fixed-wing airplane, 2m F3A or 3D, as well as 35cc gas to electric powered conversions.

Features: 

• High performance microprocessor, best compatibility with all kinds of motors, highest driving efficiency.
• Anti-spark circuit eliminates sparks when the battery pack is connecting with the ESC.
• Three types of start mode: Normal / Soft / Very-Soft, compatible with aircraft and helicopter.
• Smooth, linear, quick and precise throttle response.
• Multiple protection features: Low-voltage cut-off protection / Over-heat protection / Throttle signal loss protection.
• The throttle signal is transferred through optical/electrical coupled system to avoid electromagnetic interference.
• Perfect governor mode for helicopter.
• Wide-opened heat-sink has the best heat dissipation effect.
• The firmware of the ESC can be updated through the built-in USB adapter in the Professional LCD Program Box.
• User programmable.
• Multiple program methods supported: transmitter stick, Digital LED Program Card, Multifunction LCD Program Box, Professional LCD Program Box, PC software. Very easy to program the ESC at home or at the flying field. Program cards are optional and are not included.

Specifications:
Output: Continuous 120A, burst 180A up to 10 seconds
Input Voltage: 5-12 cells lithium battery or 15-36 cells NiMH battery
BEC: None
Refresh Rate: 50Hz to 432Hz
Control Signal Transmission: Optical/electrical coupled system
Max Speed: 210000rpm for 2 Poles, 70000rpm for 6 poles, 35000rpm for 12 poles
Size: 88x55x15mm
Weight: 125g