If it is the Orion system it will not work with AMB. Orion uses an Infrared light system to count laps. Here's the data from Orion site.
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The lap-counting unit (receiver) uses Infra-red (IR) light to communicate with the vehicle transmitting unit.
· Counts lap times within 1/100th of a second
· LCD backlit display, displays best lap, individual lap times, total race time.
· Adjustable target lap time.
· Sound signal to indicates: start , each lap, best lap, laps under target time, end of the practice.
· 100 different transponders available, counting system can be adjusted to work with any transponder.
36000 PRO Lap Counting System
36010 Additional transponder
36020 PC Link + Software
Patented by Alex Racing in Europe, USA and Japan.
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http://www.teamorion.com/faq/pro_lcs.asp for all the details. Make an informed choice before you buy. Education is a great thing. Stay in school. Learn something new every day. Some of these guys have been in RC longer than I've been alive (ok that's an exaggeration).