Sorry for triple posting but I HAD to point this out from the LSAT rules:
Test supervisors are directed to dismiss from the test center any test taker discovered using, or in possession of, any type of electronic device such as electronic timers, beeping watches, alarm watches, calculator watches, electronic cigarettes, cellular phones, beepers, pay phones, pagers, headsets, photographic or recording devices, listening devices, personal digital assistants, personal computers, and iPods or other media players. Violations will be grounds for score cancellation. LSAC and test center staff assume no responsibility for personal items. The only timing device that test takers are allowed to have in their possession at LSAT test centers is an analog wristwatch.