Impinj say the tag can perform reads with RF power levels down to -19.9 dBm and writes down to -14.1 dBm. -19.9 dBm is about 10 uW (micro watts). -14.1 dBm is

Impinj say the tag can perform reads with RF power levels down to -19.9 dBm and writes down to -14.1 dBm. -19.9 dBm is about 10 uW (micro watts). -14.1 dBm is about 38 uW.