Transmit any audio format to all FM radios within your home/office/car. Create your own personal commercial-free radio station within you home, office or car. Works with PC/MAC: Transmit from your desktop or notebook computer. No drivers needed. Use PC speakers and transmit at the same time using included Y-port adapter. Works with virtually any device: iPod, MP3 player, CD player, PDA, DVD player, Notebook/Desktop PC/MAC and more… Broadcast from any audio format source: MP3, MP4, WMA, WAV, AAC, internet streaming audio, internet radio, CD audio, DVD audio, etc. Versatile 4-way power feature: PC/MAC USB power, (2) AAA batteries, 12/24V car power,100- 240V A/C power. All cables and power accessories are included. Batteries not included. PLL Synthesized: Digitally tuned for extra stable transmission No frequency drifting – No retuning necessary. LCD display: Indicates – transmit frequency, power setting, memory indicator. User adjustable frequency range: User adjustable 200 frequency range from 88 – 108MHz. Interchangeable External antenna: Removable, interchangeable with SMA connector. A 17 inch telescoping antenna is included. User adjustable transmit range/power up to 450 feet: Two-button user adjustable from 0 to 200mW. Transmit range is up to 450 feet (up to150 meters). Microphone input option: Allows user to plug in standard 3.5mm microphone to transmit voice or voice over audio. Memory function: Allows user to save frequency and power setting. Four memory buttons are included allowing four different display settings to be saved. 4-way power: Unit may be powered via (2)AAA batteries, USB, AC or car power, all power accessories are included*. Removable unit stand: Allows unit to be easily converted from desktop to portable use.