This is the Castle Creations Sidewinder SV3 12V Electronic Speed Control and the 1406 Series 4600kV Sensorless Brushless Motor. FEATURES: SV3 12V ESC (CSEM0115) Recommended for all 1/10 scale buggy and truggy applications that weigh less than 5lbs (2.25kg) ready to run (not for use in heavier vehicles such as E-Revos or E-Maxx class vehicles) USB programming capability via Castle Link USB adapter (not included, order CSEM6300) Waterproof for use in nearly every environment (not intended for operation while submerged in liquid) Reversible with reverse lockout 1406 Series 4600kV Motor (CSEC0000) 540 size can replaces many stock brushed motors Four magnet, four pole rotor for greater torque 1.4" diameter slotted stator Removable end bell INCLUDES: Sidewinder SV3 12V ESC with 13 gauge Motor Wires, 4mm Female Bullet Motor Connectors, 13 gauge Battery Wires with Pre-Tinned Leads, Receiver Connector, On/Off Switch, Instructions, 4600kV 1406 series Brushless Motor with 4mm Male Bullet Connectors REQUIRES: Battery connector of modeler"s choice SPECS: ESC; Input Voltage: 2S LiPo minimum, 3S LiPo maximum, 9 cell NiCd/NiMH Brake: Proportional Reversible: Yes, with lockout Dimensions: 1.93 x 1.48 x 0.79" (49 x 38 x 20mm) Weight: 1.96 oz (55.5 g) with 5" (127mm) long battery wires and no battery connector Motor; kV Rating: 4600 Can Length: 1.9" (49mm) Can Diameter: 1.4" (36mm) Shaft Diameter: 1/8" (3.2mm) Weight: 5.9 oz (169.5 g) Connector: 4mm gold Wire Length: 9.5" (241mm) jxs 01/10/13 ir/jxs