This is the Tekin B1R 1/18 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 (off +10 steps) Push Control - Anti Drag (11 steps) Throttle curves (6 Choices) B1R Reverse Type (None, Immediate, Delay) ev, Rev Delay 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/Reverse ON Resistance: 0.0052 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