Zeppin Voice Lap System
Zeppin have released this new Voice Lap System which provides accurate lap time measurement to racers in real time. Similar to other systems on the market, you mount the IR transponder to your car and place the receiver next to the track and the system will collect your lap times. The Zeppin system will output human voice lap time announcements through the 3.5mm audio jack, which can be connected to a speaker or wireless audio transmitter (not included) and with 10 channels available you can be sure that you can collect your times even with other systems being used on track at the same time.
Source: Zeppin [zeppinracing.com]