It is the most significant top-class product for aircraft and helicopter. Typical Applications: 1) Powerful for 500/ 600 class helicopter ( Working with 2-6 cells Lipo battery) 2) Powerful for huge scale aircraft such as F3A Specification : 1) Output: Continuous 70A, burst 90A up to 10 seconds. 2) Input Voltage: 2-6 cells lithium battery or 5-18 cells NIMH battery. 3) BEC: Switch Mode BEC. 4) Control Signal Transmission: Optically coupled system. 5) Size: 52mm ( L) * 24mm ( W) * 15mm ( H) . 6) Weight: 65g. Features : ( 1) High performance microprocessor brings out the best compatibility with all kinds of motors and the highest driving efficiency. ( 2) Wide-open heat-sink design to get the best heat dissipation effect. ( 3) Three types of start mode: Normal / Soft / Very-Soft, compatible with aircraft and helicopter. ( 4) Smooth, linear, quick and precise throttle response. ( 5) The throttle signal is transferred through optically coupled system to avoid the electromagnetic interference. ( 6) Multiple protection features: Low-voltage cut-off protection / Over-heat protection / Throttle signal loss protection. ( 7) Perfect governor mode for helicopter. ( 8) User programmable. Very easy to program the ESC at home or at the flying field.