Specification Applications:RC Toy CarsDIY RC ProjectsEducational ElectronicsHobbyist Remote Control SystemsDimensions: 3.5 * 7 cm emission plate,receiver board 2.6 * 4.3 cm;Frequency: 27MHZ/40MhzTransmitter voltage: 3-4.5V;Receive board working voltage: 4.5v-6vReceived board OUTPUT:4 lines, 2v-3.5vreceiving range of about 10 metersConnection method:(A) emission plate: red V positive power supply,  black wire V-  negative power supply,    ANT connect the antenna; 3-4.5V(2) receiver board: black wire = negative power supply,  red wire =positive power supply;L R wire for motor 1   can supply  continue powerful supplyF B wire for motor 2   can supply continued power supplyNote:note: only  use small power motors, such as 130 motors, high power motor can burn the board.