1. for RTL-SDR V2 cannot receive shortwaves, because the for RTL-SDR for RTL2832U chip itself does not directly support shortwave reception, because it lacks the direct downconversion function for the HF band (below 24 MHz), so for RTL-SDRV2 cannot receive shortwaves due to hardware limitations. If you want to receive shortwave, it is recommended to choose for RTL-SDR V4 for RTL-SDR has a rich supporting software ecosystem, covering multiple platforms such as computers, tablets, and mobile phones. Real-time sampling rate: Approx. 2.4 MS/s (million samples/sec) Actual stable value may be slightly lower) I/Q mode: Support complex sampling (orthogonal downconversion) Resolution: Number of ADC bits: 8-bit (for RTL2832U built-in) with limited dynamic range for entry-level applications. Interface: USB 2.0: Depends on computer processing signals (may be limited by USB bandwidth) Cost-effective entry SDR: Compared with professional SDR equipment (e.g. for HackRF, USRP), it is inexpensive and suitable for beginners to learn radio technology. Compatible with mainstream SDR software (SDR#, GORX, HDSDR, CubicSDR, etc.) without additional drivers. Color: Black Material: ABS Package Contents: 1 x receiver 1 x antenna