An object is to provide a semiconductor device including an RFID which can
transmit/receive individual information without a change of a battery
accompanied by deterioration over time of the battery as a drive power
source, and to which driving power can be supplied to keep a favorable
transmission/reception state of the individual information even when an
external electromagnetic wave is not sufficient. The semiconductor device
includes a signal processing circuit, a first antenna circuit and a
second antenna circuit operationally connected to the signal processing
circuit, and a battery operationally connected to the signal processing
circuit, in which the first antenna circuit transmits/receives a signal
for transmitting data stored in the signal processing circuit; the second
antenna circuit receives a signal for charging the battery; and a signal
received by the first antenna circuit and a signal received by the second
antenna circuit have different wavelengths.