EKP2 is a user-friendly keyboard designed to enter the starting number and missed shots in biathlon. The keyboard connects to an ESK2 assembly box, which in turn connects to the ECB1 finish station. ESK2 has two outputs for EKP2, in addition to data in and data out. This means that you need 1 ESK2 for every other EKP2. One EKP2 KeyPad is usually enough for 5-6 targets.
Support page: EKP2