Detailed Product Description Technical specifications: 1. Effective shielding range: 10-25 meters radius 2. Isolation bandwidth: CDMA: 869-894MHz GSM: 925-960 MHZ DCS:1805-1880MHZ WCDMA:2110-2170MHZ PHS:1900-1925MHZ PCS:1930-1990MHZ Z 4. Operation temperature: -40c to +55c 5. Humidity: 30% to 95% 6. Power adapter: Input: 100 to 240V AC Output: DC4V