... 5PCS; Equipped with hand held receiver, can read long-distance data, Wireless transmission up to 30m. . Technical Specifications FunctionHigh ... VoltageBelow 60KV line test (with 5 insulation rods operation)Data Memory99 sets, memory process is shown by MEM , ... mode, press HOLD key to keep data, shown by “ HOLD ”Data Access “ MR ” indication, can access to all dataOverflow DisplayOver-range overflow ...