This is the BLC-30C 30A Car Sensorless Electronic Speed Control from Ace RC. FEATURES: LiPo programmable low voltage cutoff Ideal for 1/10 scale on road RC vehicles using brushless sensorless motors up to 3500kV Automatic initial programming Reverse with programmable reverse lockout for racing Propotional braking Program card for easy adjusting of parameters Anodized aluminum heat sink INCLUDES: BLC-30C 30A Car Sensorless ESC with Tamiya type Battery Connector, three 4mm Female Bullet Motor Connectors, Capacitor, On/Off Switch, Universal Receiver Connector, Cooling Fan, Program Card, Instruction Sheet, and three 4mm Male Bullet Connectors SPECS: Continuous Current: 30A Input Voltage: 6V-7.4V (2S LiPo) High Temperature Protection: Yes Motor Limit at 7.4V: 540-3500kV Pulse Frequency: 1KHz BEC: 5V @ 2A Dimensions: 1.5 x 1.2 x 0.75" (38 x 32 x 19mm) w/o cooling fan Weight: 1.76oz (50g) jxs 12/04/12 ir/jxs