6 FX3 functions, .5A. Decoder features two 6.5mA function outputs, supports Digitrax FX3 functions and 14, 28 or 128-step speed control. Other features include: QSI-style PCB replacement Plug N′Play decoder - allows replacement with downloadable SFX SoundBug(TM) modules Accepts Plug-in SFX SoundBug sound modules Regulated headlights no resistors are required for installation of LEDs or lamps Torque compensation for smooth, silent operation. Momentum with acceleration and deceleration. User selectable normal direction of travel. Three-step speed tables set start, mid and max voltage for custom control. 28-step speed tables with 256 level resolution for precise control. SuperSonic(TM) motor drive for silent operation. FX3 Function outputs for prototypical lighting effects and on/off control Constant brightness lighting with directional or independent control Realistic effects such as ditch lights, Mars lights, strobes, and more. Dynamic and static qualifiers operate functions based on direction, F0 on or off, loco direction and F0, and whether loco is moving. Function remapping for custom setup. Master light switch turns off all lights & functions with one keystroke. Advanced consist function controls Transponder equipped. Compatible with digital surround sound systems. Decoder lock equipped This board replacement decoder measures 2.877 x .667 x .173′ 73 x 16.9 x 4.4mm with .5′ 12.7mm stiff wires on each end and has a current rating of 1.25A.