Pro-Ject Receiver Box. Total Harmonic Distortion (THD): 0.05 %, Sensitivity: 17 dB, Frequency response: 20 - 20000 Hz. Connectivity technology: Wired. FM band range: 87.5 - 108.5 MHz. Weight: 670 g. Dimensions (WxDxH): 103 x 122 x 36 mm, Output power: 2 x 20/30W