Congratulations on the purchase of the IC-402 portable 70cm SSB Radio et-communication/groupe/transceiver'>Transceiver The IC-402 was designed to be operable anywhere like most portables, but we also included features found in most base sets like a very effective noise blanker, RIT, S & RF meter, CW Monitor and a full 3 watts output on either USB or LSB. Two built-in crystals and the stable VXO allow operation between 432.00 and 432.40MHz. If you wish to expand the range of the IC-402 we have also provided 2 spare crystal sockets for your convenience. With a slight retuning of the IC-402 and installation of a crystal, you may also work through OSCAR in USB for up-link (for mode B of AMSAT OSCAR 7) and in LSB for down-link (for mode J of AMSAT OSCAR 8). The aluminum die cast frame provides a very strong yet light housing for the 2 circuit boards, and the aluminum sides snap off easily if service is ever necessary or to change batteries. The IC-402 operates on 9 inexpensive C cell batteries, or an external 13.8V DC source. The IC-402 will also operate on nicad batteries, contained in the BC-20/BC-15 nicad battery/ charger kit. For AC operation, we recommend the IC-3PS which not only provides power for the IC-402 but also doubles as a stand and holder for the IC-30L 10 watt linear Amplifier You can use the built-in whip Antenna for portable use, or an external Antenna connects to the Antenna connector with adapter instead of the whip Antenna of the IC-402