This is an receiver with RTL2832U chip, R820T2 tuner, 1PPM TCXO, SMA F connector and aluminum housing with passive cooling. Tunable from 500 kHz to 1.7 GHz with bandwidths up to 3.2 MHz (2.4 MHz stable). (HF works in direct sampling mode). perfect for use as a computer based radio scanner with free software like SDR , HDSDR, SDR-Radio, GQRX or SDR Touch on Android. Works with computers such as Windows, OSX, Linux, Android, and . perfect for many applications including general radio scanning, air control, public safety, ADS-B radar, ACARS, trunked radio, P25/MotoTRBO digital voice, POCSAG, weather balloons, APRS, /Meteor M2 weather satellites, radio Astronomy, DAB or as a low cost panadapter with ham radio. Comes with a versatile dipole antenna kit, perfect for beginners. Short antennas are perfect for ADS-B, while antennas work at lower frequencies. When used in a v-dipole configuration, the antenna is suitable for 137 MHz weather satellites and the International Space Station. Vertical configuration for ground signals. Two brackets and of RG174 cable allow you to mount the antenna outdoors. This model has some improvements over other . It uses an improved R820T2 tuner, 1PPM TCXO, better components, a redesigned low-noise PCB, cooling improvements, additional ESD protection and SMA F connectors. It also has a software-activatable tee for powering the LNA and active antenna. NOTE: New units with the the new R860 tuner. However, note that the R860 is exactly to the R820T2, the chip just changed the name. Colour:silver :metal Package Contents: 2 x radio receiver 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.