Product Details Product Description Ever seen the signal jamming devices that designed with the outer detachable power supply and are in need of one? Then this 4 Antenna 20W High Power 3G phone & GPS Jammer with Outer Detachable Power Supply that you are viewing here just owns the function. This 20W high power 3G phone GPS jammer is a high power signal jammer as it is designed with 20W high output power, stronger and longer Omni-directional antennas and also the powerful outer detachable power supply so that the jamming distance is up to 60 meters depending on the signal strength in the given area to cut off the signals of CDMA, GSM, DCS, PCS, 3G and GPS signals at the same tine depending on the signal strength in the given area. Besides high quality cooling system with good cooling fan inside enables this high power 3G phone GPS jammer reach the nonstop 24/7 working goal easily as also designed with stable capability. And owning wide application areas is also a merit of this 20W GPS 3G mobile phone jammer as well as for places such as the meeting rooms, classrooms, training centers, factories, banks ect, this 20W high power 3G phone GPS jammer can be widely used. And for more detail information of this 20W GPS 3G mobile phone jammer just come here and know the details you are in need. Specifications Affected Frequency Ranges: -CDMA:850-894MHz-GSM:925-960MHz-DCS/PCS:1805-1990MHz-3G:2110-2170MHz-GPS L1:1500MHz-1600MHz Total output power: 20W Jamming range: up to 50m, the jamming radius still depends on the strength signal in given area External Omni-directional antennas all the TX frequency covered down link only Power supply: 50 to 60Hz, 100 to 240V AC,with AC adapter (AC100-240V DC5V20A), Dimension: 210 x 50 x170mm Weight:3.2kg Accessories 3G phone & GPS Jammer Outer Detachable Power Supply Antennas Important Notes for Jamming Distance: The jamming distances we mentioned on website are for customer’s reference only. The actual jamming distance will be varied depending on the signal strength and the use location and if full charges, etc. Important Notes for Portable Jammers with No Cooling Fan: Do not use the jammer when it is charging, or it will burn the jammer as it has no built-in fan. If because of this factor due to the broken of the jammer, the customer will lose the authority of free repairation .