The Mini Guardrail is specifically designed for demanding item-level deployments, Impinj's Mini Guardrail operates effectively at read distances of 2.9 inches or less. This antenna is the ideal choice for access control, ticketing, document control, high-speed encoding stations, packaging lines, or any application requiring high reliability and a constrained read zone. Because of its optimized shortrange performance, the Mini Guardrail is virtually immune to the RFtransmission limiting effects of items such as liquids, powders, and metallic packaging.