Acoms Techniplus 2 Channel Radio Control System, including transmitter (requires 8 x AA), receiver, 2 x servo's, battery box for 4 x AA, switch harness. Features servo reversing and can be ni-cadded (Rechargeable batteries). 40Mhz (one of twelve frequencies supplied at random - specify any requirement) recommended for model cars & boats. 40mhz for surface use only.