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This is the E-flite 30-Amp Pro Switch-Mode BEC Brushless V2 Electronic Speed Control. This is a high-quality sensorless brushless electronic speed control with an integrated switch-mode BEC that is very lightweight and efficient. It can operate without the need for a separate receiver battery to power your servos and receivers, saving you weight and complication.

Features:

• Up to 30 amps continuous current with proper air flow and 35 amps burst current (15 seconds)
• 3.5A continuous current, 5V Switch-Mode BEC Circuit
• Stronger BEC for support of most 3-axis stabilization systems
• Drive up to 7 analog or 6 digital standard-size servos with the BEC
• 3 to 4-cell LiPo, 9 to 12-cell NiMH/NiCd input voltage
• Programmable motor braking
• Safe power-arm mode prevents accidental starts
• Programmable low voltage cutoff with settings for 3-cell LiPo (9.2V), 4-cell LiPo (12V) or 74% of battery starting voltage
• Programmable throttle input range (1.1ms–1.9ms or 1.2ms–1.8ms)
• Programmable soft start for helicopters and airplanes
• Auto motor shut down if signal is lost or there is interference
• Programmable timing—5 user-selectable ranges for use with a large variety of brushless motors
• Pre-wired E-flite EC3 connector on the battery input and 3.5mm gold bullet connectors on the motor output leads

Specifications:
Continuous Maximum Current: 30A
Input Voltage: 3–4S LiPo or 9–12 NiMH/NiCd
Input Connector Types: 16 AWG leads with E-flite EC3 Connector
Output Connector Types: 16 AWG leads with 3.5mm Gold Bullet Connectors
Momentary Peak Current: 35A (15 sec)
Length: 51.0mm (2.00 in)
Width: 28.0mm (1.10 in)
Height: 8.70mm (0.35 in)
Weight: 31.0 g (1.10 oz)
Wire Gauge: 16 AWG