Infra-Red ReceiverThe "brain" of your RC setup, this IR Receiver translates your remote commands into smooth motor action across two separate ports. Its low profile design ensures it can be tucked away inside your chassis while maintaining a clear line of sight. Properties Compatible with both 2 and 4 channel remote Compatible with all battery boxes 2. 4G Adjustable frequency 15 25m range Usage Used as the "brain" of your set Note Requires battery (not included)