This is NEW USB version, you can add the 5V power or without the power.
This Lap Timing System is a fully operational lap counting system for all RC Model of all size.
The transponders are extremely small and can free in all RC Cars.
Everytiny and lightweight transponder is encoded with a unique ID By crossing the start/finish line the recognized and processed by the receiver module mounted to the lap counting bridge.
l. For Indoor and Outdoor Tracks
2.Unlimited cars running at same time
3.Personal transponder with unique ID (Compatible with Robitronic)
4.Small(only 12x12x6mm)and lightweight Transponder(1.2g)
5.Software for all Windows System(RCM or Zround)
6.Fully USB Support
7.Receiver Modules with Power Led & Action Led Display
1.Windows 2000 , XP, Vista, Windows 7,Windows 8 or 8.1 (32/64-Bit System Support)
2.One available USB 2.0 port
4. Build your own bridge by any material like 1inch PVC pipe or wood. High required from sensor to ground (16 inches/40.6cm)
Lap Timing System in Box
Optional with the combo order buy transponder
1 x USB PC-Interface with data cable
1 x 4 Receiver Modules for track with max width (4 feet/1.2 meter)
Also you can free download Zround software (Download Link)