... your MP3 or any audio source including your PDA, CD Player, Cassette player or connect it to your PC or laptop computerTune ... or receiver to the clearest FM frequencySupporting devices: MP3, MD, CD, VCD, DVD, PDA,PC, LaptopEasy to read LCD frequency ... Frequency response: 20Hz-20KHzSeparation: ≥ 50dBOperating current: 28mATransmission range: 87.5-108.0Mhz (interval 0.1MHz)Power source: 2AAA batteries or ...