JM-020: Portable mobile phone jammer

• Portable mobile phone jammer : pocket size , internal battery
• Frequency:800-900 MHZ , 1800-1900MHZ, 2.1-2.2 GHZ
• Output: 1W
• Input Power: internal battery or 12V DC
• Available System : AMPS, GPRS, GSM , DCS, CDMA, PHS, W-CDMA, UMTS
• Dimension: 110 mm x 62 mm x 30 mm
• Effective Range: 20 meters
• Weight : 300g with internal battery
• Application : meeting room , class room , gasoline station ,church, bank