This is the Hobbywing Platinum Pro V4.1 200HV ESC, for use with 700-800 sized Helicopters.

Features

• High-performance 32-bit processor combined with advanced algorithm makes the speed-governing excellent for different conditions. With the adjustable sensitivity of speed-governing, every pilot can find the most suitable settings for his helicopter.
• 6-14S
• The elegant cases are made by Aluminum. Top level components combined with the exquisite industrial design guarantee the Platinum HV 200A SBEC V4.1 ESC the unmatchable quality & look.
• The built-in switch-mode BEC with continuously adjustable output voltage range from 5V to 8V (step: 0.1V) supports connecting a 2S backup battery (to the connection) in parallel for improving the safety and reliability, its backflow-proof circuit prevents the voltage (which is higher than the BEC voltage) from the servo or backup battery from flowing back to the BEC. The addition of buffer enhances the output of high peak current to make the servo response more precise and quick.
• A 32-bit microprocessor, 72MHz
• he built-in spark-proof circuit effectively eliminates the sparks produced when the ESC is powered on and extends the service life of connectors.
• Programming through WiFi Express Module or LCD program Box (purchase separately)