Emit RAC2 is a junction box used in combination with ESK2 to connect multiple EKP2 keyboards to a PC. RAC2 is the last junction box connected before the PC. The only difference between ESK2 and RAC2 is that RAC2 has a USB output.
RAC2 is primarily used in ski jumping, where the EKP2 keyboards are used to enter the score from the judges.