Direct sampling -SDR TECHNICAL SPECIFICATIONS. Fully assembled and to use. Uses RTL2832U+R820T2 chip set.The R820T2 has slightly better sensitivity than the R820T and also works better at frequencies around 1.5 GHz. 100% compatible with software for the older R820T.100KHz to 1766MHz, operating frequency. 1 PPM temperature compensated oscillator (TCXO). tuning and temperature (2 PPM initial offset, 1 PPM temperature )Covers all HF amateur bands. Covers VHF UHF bands from 24-1766MHz. Up to 3.2 M Sample rate. (~2.8 MHz stable)Receiver modes AM, NFM, FM, , USB, LSB and HF Shortwave Q branch direct samplingNote: depends the SDR software used with the receiver8-bit giving ~50 dB dynamic range50 Ohm input impedance antenna inputs for Shortwave and VHFUSB computer connection ( mini usb) Powered by common USBReceiving /MF/HF (0 - 30 MHz)The HF band antenna must be connected to the Ant input portsignal receiving HF band needs to the HF Antennas such as Long Wire, Random Wire, Dipole etc.. To have a good effect need matching antenna.size:15x 7x 4cmMaterial: Plastic + Metalcolour: blue+blackPackage Contents:1 set x USB ReceiverOnly the above package content, other are not included.Note: Light 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.