Supports Digitrax FX3 functions and 14, 28 or 128-step speed control. Other features include: 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: Constant brightness lighting with directional or independent control FX3 and standard function qualifiers operate functions based on direction, F0 on or off, loco direction and F0, and whether loco is moving. Function remapping for custom setup. Decoder lock All-mode programming with operations mode read back (reads back CV values on the mainline) Decoder reset CV with or without speed table reset. Motor isolation protection prevents decoder damage. Basic, advanced & universal consisting Two- or four digit addressing DCC compatible FCC Part 15, Class B RFI compliant This small decoder features an NMRA 8-pin plug on wire leads. Measures: Size: .418 x .340 x .112′ 10.6mm x 8.7mm x 2.86mm 1.0 Amp (2.0 Amps Peak)