LocoFi'ed ScaleTrains HO Scale GE Tier 4 GEVO CSXT #3399 diesel locomotive equipped with LocoFi 3 (DULLHB).
 
Introduced in 2012, General Electric’s ET44 GEVO Series represents the latest in diesel-electric locomotive technology—nearly every Class I railroad in the United States and Canada roster the GE Tier 4 GEVO.
 
Features:
New road numbers
Era: 2022 to Present
Series 3375-3399, built 2016-2017
Road numbers 3382 and 3399 
Added Distributed Power (DP) logos for 2022 to the present era
Fully-assembled
Multiple road numbers
LED-illuminated front, rear
LED-illuminated front deck-mounted ditch lights
Printed and LED-illuminated number boards
LSL (Locomotive Speed Limiter) indicator lights on cab sides (non-operating) 
Sill-mounted brake stick holder
Sill-mounted tow chain
Semi-scale coupler buffers equipped with durable metal semi-scale lower shelf Type E knuckle couplers
Multiple unit (MU) cable with attachment chain
Battery charging receptacles on front and rear pilots
See-through round-hole stepwell steps
Walkway with front anticlimber
GE “nub” pattern walkway tread
Sand box clean out door with knuckle buster latch and hinge
Wide profile end handrails
Front nose headlight
Extra nose front grab iron on engineer’s side of cab
Nose door with window
Cab with barrel bolt latches on subbase doors
Detailed cab interior with separate floor, rear wall, seats, and control stand
In cab grade crossing camera mounted on right side
Tinted cab side windows
Tall mirror mounted in front of sliding cab side windows on both sides; additional small mirror on right side
Cab roof large square antenna dome, two long STI-CO PTC Dual Track Antenna System without Radome covers 
Grab on roof immediately behind cab roof
See-through dynamic brake exhaust
Left side dynamic brake cab: tri blower dynamic brake with flush exhaust
Etched metal see-through dynamic brake intake grilles with blower motors visible inside
Right side dynamic brake cab: door with grille, door with grille, small grille, and door with grille
Current production engine cab (long hood) with angled exhaust compartment roofline
Lost wax brass cast Nathan AirChime K5HLR2 horn mounted on engine cab roof 
Separate exhaust stack
40 individually applied etched metal see-through radiator intake and exhaust grilles on sides and top of radiator compartment
Standard production radiator door grilles
Raised center brake wheel
Accurately profiled frame with separately applied plumbing and traction motor cabling
GE Hi-Ad trucks with separately applied brake cylinders, air plumbing, and rotating bearing caps 
Rust-color painted wheelsets
AEI tag mounted on right sidesill
5,300 gallon fuel tank with external waste retention tank
Dual fuel fills per side with rear fill “blanked”
Factory-applied wire grab irons, snowplow with grab irons, spare knuckles, trainline hoses with silver gladhands, 3-hose MU clusters with silver gladhands, uncoupling levers, windshield wipers, mirrors, sunshades, air dryer, air tanks, fuel tank mounted electronic bell, and more
Motor with 5-pole skew wound armature
Dual flywheels
All-wheel drive
All-wheel electrical pick-up
Directional LED-illuminated headlights
Printing and lettering legible under magnification
Operates on Code 70, 83, and 100 rail
Packaging safely stores model
Minimum Radius: 18”
Recommended Radius: 22"
 
Here's the link to the original product: https://www.scaletrains.com/rivet-counter-ho-scale-ge-et44ah-csx-yn3-boxcar-logo-dp-sticker-1.html
 
LocoFi'ed Series introduces the most popular and well-known locomotives and trains to modelers, now equipped with LocoFi™ modules to enable it to run on DC, DCC or deadrail layouts, with no additional wiring or equipment installation required. All you need is an Android / Amazon Fire device - cellphone or tablet (no Internet required) with LocoFi™ app installed, available for FREE on Google Playstore / Amazon Appstore. If you are new to LocoFi™, and would like to see if it is for you, then LocoFi'ed Series offers the perfect chance to try it out.
 
This is a one time opportunity to own a customized LocoFi'ed ScaleTrains HO Scale GE Tier 4 GEVO CSXT #3399 diesel locomotive equipped with LocoFi 3 (DULLHB). Pre-installed LocoFi'ed Series are rare and limited in number, hand soldered with care and attention to detail, with highest level of craftsmanship and technique, in the USA.
 
The LocoFi module is pre-installed. Simply install the app, connect and run!
 
Please reach out if you have any questions.
 
Technical Specifications
Input Power Type: Clean (NOT pulsed) DC, DCC or battery - Yes, an old laptop adapter laying around is ideal
Input Voltage: 7V - 24V - Wide input voltage range
Current Rating: 1.5A (1A motor) - High amperage decoder
Motor Operating Voltage: Same as input voltage
WiFi Spectrum: b/g/n (2.4 GHz)
Smart Devices Supported: Android
Speaker with custom tuned enclosure included
Sound Scheme: Diesel; 8-bit 16kHz; .WAV; 3 channel polyphonic; stored on pluggable microSD to easily load custom sounds
Supported Sounds: Engine Startup, Idle, Shutdown, Horn and Bell
Lights: Front and Rear, LEDs, On / Off, 10mA max on each output; resistors onboard
Other: Onboard capacitor for typical dirty track issues
Supported OS: Android 5.0+, Fire 5+