The RC4 decoder box is the latest decoder box from MyLaps. This box will read additional data such as car ID's, transponder temperature, and transponder voltage. The decoder box comes with the latest firmware, power supply, cables. This decoder box will score ALL MyLaps personal transponders (2-wire and 3-wire).
NOTE: You will also need to purchase a detection loop and connection box (coax) which connect to the decoder box to score laps.