Check the listing for details. SRAD-1 Kit - 52Mhz USRP based OpenBTS SDR GSM Base Station -12 VDC Power Supply. Condition: Open box. Listed at 119.99 USD. 0 0 1 149 855 4G ENG, INC. 7 2 1002 14.0 Normal 0 10 pt 0 2 false false false EN-US ZH-CN X-NONE $([{£¥·‘“〈《「『【〔〖〝﹙﹛﹝＄（．［｛￡￥ !%),.:;>?]}¢¨°·ˇˉ―‖’”…‰′″›℃∶、。〃〉》」』】〕〗〞︶︺︾﹀﹄﹚﹜﹞！＂％＇），．：；？］｀｜｝～￠ Based on the USRP1 rev 4.5 and RFX 900 / 1800, the SRAD-1 (Rev 1.0) is a custom designed OpenBTS GSM Base Station board with the following specifics:TCXO 0.1ppm 52.000MHz Ultra precision Golden Oscillator;Software define the frequency range 1 (750 – 1050 Mhz) and range 2 (1500 – 2100 Mhz); The following on-line documents can be found:SRAD-1 Schematics (or google iplinkme for it)SRAD-1 Board dimensions drawing (or google iplinkme for it)The kit includes:SRAD-1 board with frequency range 1 (750 – 1050 Mhz) or range 2 (1500 – 2100 Mhz) x 1USB 2 cable x 1900 Mhz / 1800 Mhz 3dbi Antenna x 2 andWithout AC /DC wall mount adapter (12V 24W) No memory stick and no software support!!! Note: It was supposed to connect desktop computer 12DC power supply. IT NEEDS 12 VDC POWER SUPPLY.If you need OpenBTS demo ISO file and manual: OpenBTS demo ISO file (or google iplinkme for these) If need the software defined radio (SDR) GSM Base Station ready, please refer to: HP USRP OpenBTS Software Defined SDR GSM Base Station System 1U Rack USRP Based OpenBTS / SDR GSM Base Station Development kit