Description Item Name Circuit boardMaterial Metal and plasticColor As the picture shownProduct Weight About 12 4gFit For All rc cars such as wpl jjrc mn model hs and wltoys brand vehiclesSpecification of the Receiver Board Working Voltage 7 4v 11 1vBattery 2 3s Recommendation it is not included in the pakcage The full set of the second generation engine sound system product id 1578046Package included 1X Circuit Board