SMA Female Antenna Port - Universal dongles use the less common MCX or PAL antenna ports. SMA is more common, so more adapters and antennas are available for it. It also has lower RF insertion losses.<br><br>HF Reception in Direct Sampling Mode - Listen to 100 kHz - 25 MHz with direct sampling. Simply connect an HF antenna to the SMA port and select the Q-branch mode. There is a built-in 25 MHz low-pass filter, but additional HF filters may be required for optimal performance (e.g., to attenuate strong MW AM).<br><br>Improved Cooling System, Large Aluminum Housing and Passive Cooling - These units come standard with an aluminum housing and passive cooling via two heat sinks. And the PCB is specially designed for passive cooling with cooling holes and a large aluminum housing. This prevents reception failure due to heat above ~1.2 GHz<br><br>Uses R820T2 tuner, higher quality passive components, one on the USB line to reduce USB noise, a much improved PCB design for significantly less internal interference and noise, various breakout pads, improved ESD protection, additional bypass capacitors and ferrite power line chokes, improved front-end matching circuit and a better LDO.<br><br>Lower overall noise, more sensitivity. Can tune from 100 kHz to 1.8 GHz and has up to 3.2 MHz (2.4 MHz stable) of instantaneous bandwidth. (HF reception below 24 MHz runs in direct sampling mode)<br><br>With LNA, low-noise amplifier for the HF signals. 10 times the amplification than normal HF reception.<br><br>Perfect for many applications including general radio scanning, air traffic control, public radio, ADSB, ACARS, trunked radio, P25 digital voice, POCSAG, weather balloons, APRS, APT weather satellites, radio astronomy, meteor scatter monitoring, or for use as a cheap panadapter with a traditional amateur radio.<br>Color: Random color (Random color, do not accept the specified color.)<br>Material: Metal<br>Different batches, there may be color differences.<br><br>Package Content:<br>1 x RTL SDR Receiver<br><br>Only the above package content, other products are not included.<br>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 +/- 1-3 cm.