This is the Novak GTB 2 Brushless Electronic Speed Control with X-Drive and Low Profile Heat Sink. FEATURES: Designed specifically for all forms of brushless powered 1/10 scale racing X-Drive is the newest motor-firing firmware and hardware that provides enhanced throttle response, ultra smooth power delivery, higher top speeds, and cooler operating temperatures NovaBrakes for instant braking under any condition Nine adjustable parameters including Minimum Brake, Drag Brake, Minimum Drive, Dead Band, Throttle Curve, Brake Curve, Brake Frequency, Brake End Point, Drive Frequency, interface also features Reverse Disable and Motor Rotation 3A true spec BEC (battery eliminator circuitry) Meets ROAR Sportsman Class Racing specifications Voltage cut-off circuitry prevents damage to LiPo/LiFe batteries Low profile heat sink for easy fit in tight spaces 120 day limited warranty through Novak beginning at date of purchase INCLUDES: Novak GTB 2 Brushless ESC with Power and Battery Wires, Low Profile Heat Sink and Instructions SPECS: Motor Type Sensored brushless 540 size, 8.5T or higher, 550 size 6.5T or higher Input Cells: 1*-2S LiPo LiFe or 4-6 NiMH Size: 1.16 x 1.47" (29.5 x 37.3mm) Height: 0.70" (17.8mm) Weight: 1.15oz (32.6g) without wires On-Resistance: 0.00040 ohms @ 25°C trans. temp. BEC: 6.0V DC/3.0 amps Wire Size: 14G Super-Flex Copper-Strand Silicone Wire Status LEDs: 5 multi-colored *For 1S applications, a receiver battery pack or a receiver booster such as Novak"s #5477 1S Booster Module, NOVC5477 must be used jxs 03/15/12 ir/jxs