This is an RTL-SDR receiver with RTL2832U ADC chip, 1PPM TCXO, SMA F connector, R820T2 tuner 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 traffic control, public safety radio,ADS-B aircraft radar, boat radar, ACARS, trunked radio, P25/MotoTRBO digital voice, POCSAG, weather balloons, APRS, APT weather satellites, Meteor M2 satellites, radio astronomy, meteor scatter monitoring, , or for use as a low cost panadapter with a traditional ham radio. This model has several improvements over other . It uses the improved R820T2 tuner, comes with a 1PPM TCXO (no drift and accurate tuning with a 2 PPM initial offset and 1 PPM temperature drift), improved component tolerances, redesigned lower noise PCB, cooling improvements, extra ESD protection and an SMA F connector. It also comes with a software activatable bias-tee circuit for powering external devices such as LNA's and active antennas. Quantity:1Pc colour:Silver Material:metal size: 8.8x 2.3x 1.5cm Package Contents: 1* Only the above package content, other products are not included. Note: Light 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.