Overview: Receiver sensitivity: lt;-80d Bm (per 1%) Signal noise ratio (SNR gt;68DB) Frequency :87.5~108.0 Mhz, 0.1 Mha/step Power from ipod amp;iphone Diatance: 33ft (in open space) Operating temp amp; humidity: 14!122F.O~95% Work current: 25m A Voltage: 3.3 V Specification: Weight Approx:55g Size Approx:9 x 4 x 3