HPA-480 is a 22 Watt output (min. @P3dB) RF Power Amplifier; within frequencies of 440 to 520MHz; operating from a single 12VDC power supply. Also usable within 430-530MHz, 9-15VDC (not recommended). With proper (active) cooling is capable of 28 Watt RF power out (@Psat), under special (non-standard) warranty.