This is a field case for your X2 Club decoder box that can be placed trackside by the scoring loop. It protects it from rain, dust, and other weather elements. The field case can be powered with the AC power supply (included), or a 12v battery (not included). A jumper cable for a 12v batter is included, but the battery field case is sold separately (LTM-9003). X2 Club Decoder is not included.