You spoke, we listened! This premium RTL-SDR was designed, developed and fabricated by Nooelec in the USA and Canada in order to implement a wide array of feature requests. For full product specifications, please visit our website at nooelec.com Included: ? NESDR SMArt SDR in black brushed aluminum enclosure ? Antenna base w/ 2m RG58 cable ? Telescopic antenna mast (variable frequency capability) ? 433MHz (ISM) antenna mast (10.5", fixed frequency) ? UHF antenna mast (4.5", fixed frequency) SDR Specifications: ? RTL2832U Demodulator/USB interface IC ? R820T2 tuner IC ? 0.5PPM, ultra-low phase noise TCXO ? RF-suitable voltage regulator ? Shielded primary inductor ? Integrated custom heatsink ? Female SMA antenna input ? High-quality black brushed aluminum enclosure ? Through-hole direct sampling pads on PCB Antenna Specifications: ? Wide base with super-strong magnet within base for easy mounting ? Low-loss RG58 feed cable ? 2m (6.5') cable, twice as long as most low cost SDR antennae ? Heatshrinked male SMA connector for direct connection to the SDR or our other SMA-connected accessories like the Ham It Up TCXO Specifications: ? Frequency stability: 0.5PPM (max) ? Phase noise @1kHz offset: -138dBc/Hz (or better) ? Phase noise @10kHz: -150dBc/Hz (or better) ? Phase noise @100kHz: -152dBc/Hz (or better)