Shenzhen Gutea Electronics Co., Ltd, as a factroy since 1998, Has passed CE, FCC and ISO9001 Quality System etc.
Gutea Professional manufacture following products: (made in China)

O Cell Phone Signal Jammer
O Jammer--GPS, UMTS850/1900/2100MHz, W-CDMA, PHS jammer
O Jammer--3G (UMTS, CDMA2000), WiFi (1.2/2.4GHz), GSM1800/DCS jammer
O Jammer--CDMA /AMPS / TDMA / NMTP, Etacs, GSM900, DECT, PCS/TACS Jammer / breaker / isolater
O CDMA / GSM / DCS / WCDMA / PCS /3G Repeater, Booster, Amplifier
O Antenna
O Cable