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 on Android. Works on , 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, AIS boat radar, ACARS, trunked radio, P25/MotoTRBO digital voice, POCSAG, weather balloons, APRS, NOAA 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:2Pc colour:Silver Material:metal size:8.8x2.3x1.5cm Package Contents: 2 x 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.