PJ-N21 – All-in-One 21 Bands Portable Jammer with Long-Lasting Battery

Recently introduced to the Jammermfg product lineup, the PJ-N21 is engineered for users who require a powerful, flexible, and straightforward signal-jamming solution. With a weight of approximately 3.2 kg, it remains easy to transport and is well suited for both mobile applications and temporary fixed installations.

The PJ-N21 reliably disrupts a broad range of signals, including 5G, 4G, 3G/UMTS, and GSM, as well as GPS, WiFi (including WiFi 6E), LoJack, UHF, and VHF. Its effective jamming range can reach up to 25 meters, depending on local RF conditions and signal strength, providing consistent and uniform coverage without the need for complex setup or configuration.

A key strength of this model lies in its independent frequency band management. Integrated DIP switches allow each band to be activated or deactivated individually, without affecting the operation of the others. This enables precise control and targeted deployment, ensuring the device can be adapted to specific operational requirements.

The unit is powered by a built-in 7.4 V / 15000 mAh rechargeable battery, offering a working time of more than 90 minutes. It supports continuous operation while charging and can be used on the move via the included AC power adapter and car charger, providing excellent flexibility in both stationary and mobile environments.

To maintain stable performance during extended use, the PJ-N21 incorporates three internal cooling fans paired with a high-capacity heat sink. This thermal management design ensures efficient heat dissipation, protects internal components, and enhances long-term reliability.

An integrated display provides real-time access to essential operating data, including battery level, voltage, current, and system status. The system is complemented by 21 external omnidirectional antennas with an enhanced 2.5 dBi gain, ensuring balanced and consistent signal transmission across all supported frequency bands.

ODM orders are supported.

Compared with the PJ-161 portable 5G Jammer, the PJ-N21 offers several notable technical upgrades. These include support for WiFi 6E, a newer wireless standard, as well as additional less commonly used 4G frequency bands (725–790 MHz). This expanded coverage enables more effective signal control in dense and complex RF environments.

In contrast to the PJ-24 Multi-band Jamming device, a globally oriented portable Jammer designed for operation across an exceptionally wide range of regions and frequency bands, the PJ-N21 positions itself as a more focused and rational solution. For users operating within a specific geographic area who do not require worldwide compatibility, investing in the PJ-24 is unnecessary. In such scenarios, the PJ-N21 delivers an optimal balance between performance, functionality, and cost efficiency.

Technical specifications:

Power Supply: AC 100–240 V → DC 12 V / 10 A

Jamming Range: 10–25 meters at –70 dBm (Actual range may vary depending on signal strength and the surrounding RF environment)

Antennas:
Length: 172 mm
Gain: 2.5 dBi

Dimensions: 198 × 132 × 68 mm (antennas not included)

Cooling System: High-efficiency aluminum alloy heat sink with three built-in cooling fans

The PJ-N21 is a jammer that operates from 135 to 6450 MHz. Below you can find all the operating frequencies:

1 VHF/LOJACK 135-175MHz
2 GPS L2-L5 1170-1280MHz
3 DCS/PCS 1800-2000MHz
4 RF 433MHz
5 GPS L1 1570-1615MHZ
6 WIFI 2.4G 2400-2485MHz
7 3G 2110-2170MHz
8 CDMA 850-895MHz
9 4G1 700-800MHz
10 RF 868MHz
11 RF 315MHz
12 3G 2010-2035MHz
13 UHF 400-470MHz
14 4G2 1700-1800MHz
15 5G1 617-652MHz
16 LORA 900-930MHz
17 GPS L3-L4 1370-1390MHz
18 WIFI 5.2/5.8G 5125-5850MHz
19 5G2 3600-3800MHz
20 WIFI 6E 5925-6450MHz
21 4G 2500-2700MHz

Package Contents:

Portable Signal Jammer × 1

AC Power Adapter × 1

Car Charger × 1

Antennas × 21