The aim of this study is the design and implementation of electronic marking device for orienteering. The tasks of the study is to analyze existing devices for electronic mark approaches to their structure and functionality. The object of the research is the process of functioning instruments for conducting competitions in orienteering. The subject of research is the use of electronic marks consisting of microcontroller boards, devices receiving and transmitting information to the RFID card or key chains. This paper analyzes, generalization and systematization of studies on the use of electronic marks carried tests correct operation. To assess the efficiency, was created several tests correctness transmit and receive data to RFID keychain. The survey results further improvements are planned as construction of housing, connect the remote control, saving the backup to external storage (SD card) for easy work with devices.