1. This machine adopts SDR architecture. If there is a strong broadcast near you, you may encounter the phenomenon of serial stations/mirror stations. Please be informed. 2. The input impedance of the antenna interface is 50 . For medium wave radio stations, it is recommended to connect a dedicated medium wave ring antenna externally to achieve better listening performance 3. Before listening with headphones, please pay attention to the volume setting of the headphones (EAR) to prevent discomfort caused by excessive volume Material: aluminum alloy colour: As shown Package Contents: 1 x Radio receiver 1 x cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.