SPECIFICATION: Mini FM transmitter with LCD display Compatible with all iPods, as well as iPhone,iPhone 3G Receiver sensitivity:<-80dBm(Per 1%) Signal noise ratio (SNR>68 DB) Frequency: 87.6~107.9Mhz, 0.1 Mhz/step Power from iPod & iPhone Distance: 33 ft (in open space) Operating temp & Humidity: 14~122 F.O ~98% Work current: 25mA Voltage: 3.3V