Jstvro is a handheld digital spectrum analyzer, a very affordable tool for work in all popular frequency bands. It is based on a highly integrated frequency synthesizer which offers high performance, compact size, low consumption and low cost. It has been designed to be used equally well outdoor and indoor, and can be connected to a PC for extra functionality using standard mini-USB 2.0 connector. This model comes with a nice 773 wide band telescopic antenna. Feature: Pocket size and light weight Solid case Spectrum Analyzer mode with Max and Hold, Normal, Overwrite and Averaging modes Lifetime free firmware upgrades available, open to community requested features High capacity Lipo for 16hs+ of continuous run, rechargeable by USB PC client Open Source Can be extended with internal Expansion Modules for additional band and functionality Wide band coverage to all popular sub-1Ghz bands, including 315MHz, 433MHz, 868MHzand 915MHz, also including UHF TV, 70cm and 33cm HAM radio, GSM, etc. Any frequency from 240MHzto 960MHzis covered. Material: Metal colour: Black Package Contents: 1 x Handheld Spectrum analyzer 1 x English instructions 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.