This is the Tekin T30 Pro Brushed Rock Crawler Motor with the FX-R Electronic Speed Control. FEATURES: Motor; Precision balanced pattern hand wound Legal in rock crawling competitions Lay down brushes for increased bottom end torque Completely rebuildable 10mm commutator ESC; On board temperature indicator High resolution drag brake for hold on steep inclines PC interface for custom programming (Tekin HotWire 2.0 TEKM1451 required) Solder posts for easy wire replacement Self diagnostics and factory reset Pit tune mode Digital glitch filtering QuickTune one touch programming One touch radio calibration Programmable features: Drag Brake: 11 steps Neutral Width: 11 steps Current Limiter: none, 10 steps Push Control-Anti Drag: 11 steps Throttle Profiles: 6 choices Brake Profiles: 6 choices Reverse Type: None, Delay, Immediate Reverse Strength: 11 steps Voltage cutoffs - none, 2S, 3S, custom INCLUDES: Tekin T30 Pro Brushed Rock Crawler Motor with FX-R ESC SPECS: T30 Pro Brushed Rock Crawler Motor; Input Voltage: 2S-3S LiPo, or 10 cell NiMH Shaft Diameter: 0.125" (3.2mm) fits 1/8" pinions Motor Size: 2.07 x 1.42 (52.7 x 36mm) Weight: 6.33oz (179g) Magnet Material: FB9 ferrite FX-R ESC Input Voltage: 4-9 Cells/2-3S Lipo Motor Limit: 12 turn On Resistance: 0.0012 ohms BEC: 6V/3A Dimensions: 1" x .8" x .4" (25mm x 20mm x 10.2mm) jxs 11/05/14 ir/jxs