LOSB9522 Losi MSC12L Forward/Reverse ESC w/LiPo Cutoff.

 Specifications:

Forward: Yes, proportional
Reverse: Yes, proportional
Time Delay Brake: Yes
Input Voltage: 4-cell (4.8 volts) to 6-cell (7.2 volts) DC NimH/NiCd or 2S (7.4 volts) LiPo
Momentary Peak Current: 1000A Forward and 350A Backwards
Length: 1.575 in (40mm)
Width: 1.575 in (40mm)
Height: 1.063 in (27mm)
Weight: 1.87 oz (53g)
BEC Voltage: 5V DC, 1 amp max. at 7.2V
PWM Frequency: 1kHz
Overload Protection: Thermal
Full On Resistance: 0.0014 Ohms Forward and 0.0028 Ohms Backwards