1. SMA Antenna Socket Universal dongles use the less common MCX or PAL antenna connectors. SMA is more common, so more adapters and antennas are available for it. It is also more durable and has lower RF insertion losses. 2. Use R820T2 tuners, higher quality passive components, a throttle on the USB line to reduce USB noise, a greatly improved PCB design for significantly less internal spurs and noise, various breakout pads, improved ESD protection, additional bypass capacitors and ferrite power chokes, improved frontend adjustment circuit, and a better LDO. 3. RF reception in direct sampling Listen to 100 kHz 25 MHz with direct sampling. Simply connect an RF antenna to the SMA port and select the Q branch. There is a builtin 25 MHz lowpass filter, but additional RF filters may be required for performance (e.g., to dampen strong MW AM). 4. Better cooling system, large aluminum housing and passive cooling These devices come standard with an aluminum housing and passive cooling via fan. And the PCB is specially designed for passive cooling design thanks to the cooling holes and the large aluminum housing. This prevents the reception from failing due to heat above 1.2 GHz.