This is an receiver with RTL2832U ADC 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 , OSX, Linux, Android, and . perfect for many applications including general radio scanning, air traffic control, public safety, ADS-B aircraft radar, ACARS, trunked radio, P25/MotoTRBO digital voice, POCSAG, weather balloons, APRS, NOAA APT/Meteor M2 weather satellites, radio Astronomy, 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 longer antennas work well at lower frequencies. When used in a v-dipole configuration, the antenna is suitable for 137 MHz weather satellites and the Space Station. Vertical configuration for ground signals. Two brackets and of RG174 cable allow you to easily 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 bias tee for powering the LNA and active antenna. Colour:silver Material:Metal Package Contents: 2 x RTL-SDR 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.