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wifi jammer

20W 20 Bands Indoor Handheld Signal Device 5 Meters GSM and GPS Signal Blocking

ZD-SJD-20W-20B
This professional-grade 20W handheld device delivers powerful signal blocking across 20 frequency bands, effectively disrupting all GSM communications (including 2G/3G/4G) and GPS tracking within a 5-meter radius. Designed for security personnel and confidential operations, the compact device features a rugged, ergonomic housing with intuitive one-button activation and LED operation indicators. The advanced multi-band jamming technology ensures reliable signal suppression in sensitive environments like government facilities, corporate meeting rooms, or examination halls, while intelligent thermal management prevents overheating during extended use. Operating on high-capacity rechargeable batteries (2-3 hours runtime), this portable solution combines military-grade shielding with precision antenna design to create controlled quiet zones without affecting adjacent areas. The device frequency-agile design automatically adapts to local cellular bands while maintaining optimized power output for consistent performance. With its combination of portability, wide frequency coverage, and effective 5m range, this device serves as an essential tool for temporary signal control in mobile security operations, VIP protection details, and confidential discussions.
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This high-performance mobile device represents the latest evolution in portable communication control technology, combining military-grade shielding with civilian operational practicality. As a multi-functional handheld , the device delivers comprehensive coverage across 20 critical frequency bands, including all cellular networks GSM, CDMA, 3G and 4G, GPS blocker functionality, and WiFi capabilities in the 2.4GHz and 5GHz spectrums. The 20W output power ensures effective signal disruption within a 5-meter radius while maintaining the compact portability essential for tactical operations. Unlike conventional indoor devices, this unit features adaptive frequency scanning that automatically detects and prioritizes active channels in its environment, dynamically adjusting to maintain optimal interference patterns without unnecessary power consumption. The precision-engineered antenna array provides directional control, allowing operators to focus jamming effects while minimizing collateral signal disturbance - a critical feature for sensitive environments like corporate boardrooms, government facilities, or secure examination halls.


Engineered for reliability in demanding conditions, this mobile signal device incorporates multiple protection systems rarely found in standard handheld products. The advanced thermal management system combines heat-dissipating aluminum alloy housing with intelligent temperature monitoring that automatically regulates power output to prevent overheating during prolonged use. As both a powerful GPS blocker and cellular disruptor, the device maintains stable performance across temperature extremes -20°C to 55°C with military-standard shock resistance. The WiFi jammer functionality extends beyond basic signal denial, incorporating spectrum analysis capabilities that identify and selectively target unauthorized wireless networks while ignoring approved connections. This indoor jammer device achieves exceptional 86% power efficiency through its GaN-based RF amplification system, delivering extended operation from its high-capacity lithium battery up to 3 hours continuous use. Security personnel will appreciate the discreet design that avoids visual attention while providing immediate activation through its encrypted startup sequence - ensuring the equipment remains secure when not in operation.

 (America) 5G + 5GHz

720-805MHz 4G LTE Phone (AT&T & Verizon) 1W

850-895MHz: CDMA 850 1W

1800-1990MHz: GSM, GSM1800, PHS, PCS, NEXTEL, CDMA1900, GSM1900 1W

2100-2170MHz: UMTS, 3G, WCDMA, TD-SCDMA, CDMA2000 1W

2300-2500MHz: WiFi/Bluetooth 11.bg+ 4G LTE 1W

2500-2700MHz: 4G Wimax (Sprint ), 4G High LTE 1W

1570-1620MHz GPS L1 + Glonass L1 1W

617-652MHz 5G LTE 1W

173MHz Lojack 1W

868MHz: Car Remote or GPS L2 + L5 1W

433MHz: Car Remote or GPS L3 + L4 1W

130-200MHz 1W

200-300MHz 1W

300-400MHz 1W

400-500MHzUHF & Car Remote 1W

1170-1290MHz GPS L2 + L5+ Glonass L2 1W

315MHzCar Remote 1W

433MHz 1W

868MHz 1W

1700-1800MHz4G LTE 1W

Total:20.0W

Power supply:

AC100-240V or 12V Car Charger

Jamming Range

Radius2-25 meters (-75dBm@Omnidirectional antennas)

Working time:

2.5+ Hours, Battery: Ni-Mh battery 16000mAH

Can Turn on and Charging at the same time, Each Band can Turn ON/OFF,

Weight

2.13Kg

Dimension:

187*128*48mm

Warranty:

1 year