The MYLAPS RC4 Hybrid Transponder is available now. It has many great features:

1. Half the size, half the weight
2. Low voltage operability: 2.8-16 Volt compatible
3. Comes with a separate holder, so you can easily switch transponders between different cars
4. Better quality cable (PTFE) that is racing-fuel resistant
5. 1-4 cell LiPo compatible
6. Fully hybrid:
* 100% compatible with RC2/RC3 Timing Systems (previously AMBrc)
* 100% compatible with RC4, and ready for the future