This is the Tekin B1 Electronic Speed Control For Brushed Motors. FEATURES: On-board temperature indicator PC interface for custom programming *Tekin HotWire required One touch programming and radio calibration Digital glitch filtering Solder posts for easy wire replacement Self test diagnostics and factory reset Program Features; Drag Brake (11 steps) Brake/Reverse Strength (11 steps) Current Limiter (none, 10 steps) Push Control - Anti Drag (11 steps) Throttle curves (6 choices) Voltage Cutoffs (none, 2V, 3V, Custom) Extensive Tuning via Tekin HotWire PC Interface (sold separately) 120 day warranty INCLUDES: Electronic speed control, accessories and instructions REQUIRES: Installation on the vehicle SPECS: Controls: Forward/Brake ON Resistance: 0.0013 Ohms Input Voltage: 4-8 Cells / 2-3S Lipo BEC: 5v / 1.5A Motor Limit: No limit up to 380 size Brushed Fwd Only: No Motor Limit Dimensions: 1.0 x .93 x .35" (25.4 x 23.6 x 8.3mm) Weight: 0.28 oz / 8g (with wires) tlw 7/26/07 ir/jxs