May be used to indicate type of train track and usage

HPI Racing 113697 Front Suspension Arm Set RS4 Sport 3

Also allows full control of the model when the main battery voltage is extremely low

Woodland Scenics BR5060 HO Scale Grillin' & Chillin' Trailer

HPI 86896 Ball Stud 4

Spektrum SPMMRX200 MRX200 Marine 2 Channel 2.4GHz FHSS Receiver TRX-4 Parts May be used to indicateSpektrum SPMMRX200 MRX200 Marine 2Ch 2. 4GHz FHSS Receiver Overview: The MRX200 is a 2 Channel 2. 4GHz receiver that operates on the FHSS modulation. It is a low cost solution to upgrade your RC Cars, Trucks , or boats to the interference free world of 2. 4GHz radio technology. Made for the STX2 Radio system (SPMSTX200) , users can expect a fast response and outstanding range with this budget friendly radio system. Featuring an extra long antenna lead