This is an -SDR receiver with RTL2832U chip, 1PPM TCXO, F connector, R820T2 and case with passive cooling. Tunes from 500 kHz to 1.7 GHz with up to 3.2 MHz (2.4 MHz stable) of instantaneous bandwidth. (HF mode works in direct sampling mode). Perfect for use as a computer based radio scanner with free software like SDR#, HDSDR, SDR-Radio, Linrad, GQRX or SDR Press on Android. Works on Windows, OSX, Linux, Android and embedded Linux computers like the . Great for many applications including general radio scanning, air control, public safety radio,ADS-B radar, boat radar, ACARS, trunked radio, P25/MotoTRBO digital voice, POCSAG, weather balloons, APRS, weather satellites, Meteor M2 satellites, radio astronomy, meteor scatter monitoring, DAB, or for use as a low cost panadapter with a ham radio. This model has improvements over other . It uses the improved R820T2 , comes with a 1PPM TCXO (no and tuning with a 2 PPM initial offset and 1 PPM temperature ), improved component tolerances, redesigned lower noise PCB, cooling improvements, extra ESD protection and an F connector. It also comes with a software activatable bias-tee circuit for powering external devices such as LNA's and active antennas. :1Pc colour:Silver Material:metal size:8.8x2.3x1.5cm Contents: 1* Only the above content, other are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.