Originally pioneered by Encrypta Electronics, Unisto electronic seals provided the earliest effective re-usable security seals for trucks, trailers and containers. Today over 70,000 trucks, trailers and vans worldwide rely on the increased security and operational efficiency provided by our electronic seals. Powered by long life lithium cells, Unisto's permanently mounted electronic seals generate unpredictable random numbers each time they are closed. This number must be recorded on vehicle documentation for checking at the delivery point. Any tampering with the load is easily identified if the number has changed. The easy to read illuminated display ensures checking errors are minimal even in poor light.