Purpose: This product is only used for receiving short wave broadcasting. If there is a professional antenna, it can receive HAM communication. Stable: NE602 mixing chip is adopted, with stable performance. Equipped with: with connecting wire to the stability of connection. Simple operation: easy to use and operate. : Made of materials, it is and has a long service life. Product name:RTL-SDR HF up converter Receiving frequency:150K-30MHZ Working voltage:5V Power:1.6W Local oscillator: 125MHZ, which is very important. It needs to be set in the software or+125M in frequency. For example, 7.05M is 123.05M (7.05+125) Mixing chip: NE602 explain: 1. According to the circuit design and modification in the online radio discussion 2. As long as it is used to receive short wave broadcasting, if there is a professional antenna, it can receive HAM communication 3. Provide SDR # software Color:Black Material:Metal Package Contents: 1 * RTL-SDR up converter 1set * accessories 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.