TCS M4 N Scale Decoder:
 
The M4 is a small form factor hard-wire decoder with 4 lighting functions for HO and N scale installations. This decoder is designed for installations where space is limited.
 
This decoder is also available with 8-pin NMRA plugs or Keep Alive® wires factory-installed. See the "Variants" page for more options.
 
Back EMF Load Compensation: Provides superior slow speed control and high performance under load.
 
Quiet Drive: Super-quiet motor control for "buzz" free motor performance.
 
DC Mode: Decoder will automatically detect DC power. You can also configure how your lighting effects function on DC.
 
Variable Momentum: Allows you to make custom acceleration and deceleration curves.
 
Incandescent Bulb Support: This decoder can be used with 12 Volt bulbs.
 
Function Remapping: Buttons 0 through 12 may be used to control the lighting functions of this decoder.
 
Programmable Lighting Effects: Choose from 20 separate user-programmable lighting effects!
 
Dimmable Brightness: Configure multiple different brightness levels for your LED's or incandescent bulbs.
 
Decoder Lock: Feature which prevents accidental/unwanted programming while activated.
 
Airwire™ Compatible: Fully compatible with Airwire™ operation.
 
User-Loadable Speed Tables: Configure custom speed curves and set speed limits.
 
MSRP is $61.95. (Picture courtesy of TCS.)