1. This Is The New V4 Unit And Not All Software Is Compatible With It! Compatibility With Most Programs On And Linux Is Okay For Now, But Macos And Android Are Still Catching Up. 2. SMA Female Antenna Interface 3. 4.5V DC Bias 4. Support High-Frequency Direct Sampling Mode (500 KHZ - 24 MHZ Direct Sampling) 5. Improvements Compared To Other Rtl Sdrs (R820T2, PCB Optimization, ETC.) Frequency Range: 500KHZ - 1766 MHZ Sampling Rate: Maximum 3.2MSPS (2.56MSPS Stable Value) AD Sampling Digits: 8-Bit Note:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Not Affect The Use Colour:black Material:ABS Package Contents: 1 x SDR Receiver 1 x Antenna Group 1 x Antenna Base 1 x Retractable Antenna 1 x Extension Cable 1 x Retractable Tripod 1 x Suction Cup 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.