ESU 54671 PowerPack Mini energy buffer for LokPilot V4.0, LokSound V4.0, LokPilot 5 family and LokSound 5 family, 1F/2.7V

Information from Peco's website:

flowering trees

#27 in a #232 Mounting Specifications:

Built-in track gauge

Single Pole On/On Switch

The #141 is interchangeable with the #21 and most manufacturer's Long Underset OEM knuckle couplers

Length: 127mm

(2) Spare #622 Knuckle Springs

Paint ties a realistic matte finish

(Address 01-127)

Operating the motor is straightforward: you press and hold either of the clockwise or anti-clockwise buttons to rotate the deck and release the button when you wish to stop

#524 - 28" Diameter Smooth Back Wheelsets (Code 110) - HO Scale - Freight and Passenger