Disclosed is a pneumatic tire effectively controlling uneven wear occurring in the vicinity of a main groove even if a groove width of the main groove is narrowed due to change in tread radius during inflation. The tailgate ramp system is used to support one end of the loading ramp on the tailgate of a motor vehicle. The second substrate is on the first substrate and the delivery channel is formed between the first and second substrates. The light-emitting component is disposed on the body and emits UV light to irradiate the fluid in the container. The reports may be used by broadcasters, cable operators, and content providers, and the like to establish general auditing and billing services.