Actually listen to what customers are saying as opposed to rhyming off a pre prepared script. I tried and failed to establish what body (eg. Trading Standards?) certifies their equipment........this is a vital element in establishing confidence in their services which require a tracking device. Customer services have no knowledge of these processes. The company will provide no information in writing, which says it all........they can refute any statement because you have no proof that they ever said it and they hold the tapes of recorded conversations...good luck trying to prove anything!