This is the SCX® Digital System Chronometer from TecniToys®.
Couple with the Digital Chronometer Expansion Module (SCXW2508) when there are more than 3 competitors in the race (up to a maximum of 6). Can be used with the Digital Pit Box (SCXW2506) or with the Digital Power Line Base Unit (SCXW2500).
The Digital Chronometer has 2 functions :
1) Timing During a Race - for you to see fastest laps, average lap times, the total time a race lasts and time differences between the winner and the other cars.
2) Qualifying Heat - run a qualigying heat and each car's placing will be recorded; therefore, their positionson the race starting grid. Detailed instructions.