This is the Axial AE-3 Vanguard ESC A Waterproof Forward.Reverse ESC FEATURES: On/Off switch Dean"s Ultra Male connector for connection to battery Universal receiver connector 4mm bullet sockets for connection to motor INCLUDES: One electronic speed control SPECS: Length, case only: 1.95" (50mm) Width, case only: 1.51" (38mm) Height, to top of heat sink: 3/4" (19mm) Input voltage: 3S LiPo or 8 NiCd/NiMH On-Resistance FET: 0.00055 Ohms (per phase) BEC Voltage/A: 5.0V/2.0A Peak PWM Frequencey: 12 KHz COMMENTS: The LiPo Cut-off is set to "ON" at the factory. Use the CastleLink (optional, not included) to access the advanced settings available in the ESC, available as CSEM9999, Castle Creations Castle Link USB Programming Kit. 8/28/12 phijwa