Function list
F0     Headlight/Rear-Light
F1     Engine Start/Stop
F2     Horn High-Low
F3     Horn Low-High
F4     Brake Squeal
F5     NOTCH Up
F6     NOTCH Down
F7     Return to IDLE
F8     Thrash
F9     Cold Start Override
F10   Compressor
F11   Cab Door Slam
F12   Fan
F13   Horn Long High
F14   Horn Long Low
F15   Primer
F16   Slow Flange Squeal
F17   Driver's Safety Device (in Cab)
F18   Horn Short Low
F19   Horn Short High
F20   Windscreen Wipers
F21   AWS Test (in Cab)
F22   Fire Bell Test
F23   Guards Whistle
F24   Guard to Driver Buzzer (in Cab)
F25   Aux Lighting (if used in locomotive) 
 
Please note this item includes two Class 43 TTS Sound Decoders
Installation guide 
- Supports short and long decoder addresses
- Adjustable acceleration and deceleration
- Back EMF load compensation
- Up to 19 controllable spot sounds dependent on model including whistles or horns etc
- Two sound channels allowing for simultaneous play of full locomotive engine sounds, & individual spot sounds e.g. horns, whistles, brakes, wagons coupling etc. NOTE: Only one spot sound can be played at the same time
- It is possible to alter the volume of each sound through an individual dedicated CV. Range 0-8
- Decoder is equipped to support directional front and rear lighting operation via F0 on the controller, providing that the product is fitted with lights
- The decoder is equipped with 1 aux function output controlled by F18 or F25 dependent on locomotive type (diesel or steam)
- Motor current - maximum continuous 500mA
- Motor current - peak 1amp (no function load)
- Function output current maximum—100mA (unprotected)
- Decoder current maximum continuous - 800mA (shared motor and functions)
- Number of sound channels - 2
- Termination - 8 pin plug NEM652. NMRA