A recording liquid container for containing liquid for recording to be
supplied to recording means, said recording liquid container being
detachably mountable to a mounting portion of a recording device, said
recording liquid container includes an Information memory medium storing
predetermined information; wireless sending means capable of wireless
sending of a predetermined information in said information memory medium
within a predetermined range; a wireless communication antenna for
wirelessly sending radio wave; and communication property changing means
for changing a communication property of the wireless sending.