How should I charge the battery?

Charge for at least 10 hours before first use. Turn off the power switch while charging.

What is the shielding radius?

The radius is 2-25 meters at -75dBm, depending on the signal strength in the given area.

Is OEM service available?

Yes, we offer OEM customized service for special frequency bands and silkscreen printing.

WiFi etc Handheld Jammer

Name: 28W High Power 27 Antennas Multi Frequency 2g/3G/4G/5g/GPS/WiFi etc Handheld Jammer
Brand: Shenzhen Greetwin Telecom Co., Ltd
SKU: 2094497885

Guangdong, ChinaShenzhen Greetwin Telecom Co., Ltd

US$590.00

1-49 Pieces

US$565.00

50+ Pieces

Sample price:US$698.00/piece.Request sample

Product profile

Customization

Available

Application

Company

Frequency Range

2g/3G/4G/5g/WiFi/GPS

Model NO.

GW-JN28

Frequency

2g/3G/4G/5g/WiFi/GPS

Output Power

60W

Blocking Radiuw

2-25meters

Gross Weight

3.0 Kg

Size

395 X 140 X 90mm (Main Unit Only, Do Not Include a

Working Time

7.4V/16000mAh Continue Working: Around 2.5 Hours

Cooling System

Aluminum Alloy Radiator, Build-in 3X Cooling Fan

Power Supply

Adapter 50 to 60Hz AC (110-240V AC/12V DC)

Transport Package

Neutral Packing

Specification

ISO9001

Trademark

Greetwin

Origin

Shenzhen

HS Code

8517699000

Production Capacity

10, 000PCS/Month

Key features

Multi-Frequency Coverage: Blocks 2G, 3G, 4G, 5G, GPS, WiFi, VHF, UHF, and more via 27 antennas.

Long Battery Life: Built-in 16000mAh battery supports around 100 minutes of continuous operation.

Customizable Frequencies: Supports OEM customization for special frequency bands including LoJack and UAV.

Portable Design: Compact handheld unit with aluminum alloy radiator and built-in cooling fans.

Global Power Compatibility: Works with AC 110-240V adapter and DC 12V car charger.

One-Year Warranty: Covers mechanical defects for one year from the date of delivery.

Wide Shielding Radius: Effective blocking radius ranges from 2 to 25 meters depending on signal strength.

Company profile

High Repeat Buyers ChoiceYears of Export Experience3D Software DesignR&D Capabilities

Shenzhen Greetwin Telecom Co., Ltd

Guangdong, China

Business Type: Manufacturer/Factory, Trading CompanyExport Year: 2009-08-01Nearest Port: ShenzhenAverage Response Time: ≤6.16hTerms of Payment: LC, T/T, PayPal, etc.International Commercial Terms(Incoterms): FOB, CIF, EXW, Others

AI-Powered supplier vetting

SummaryThe supplier is identified as a manufacturer with three production lines and stated output of mobile signal boosters and signal jammers. It provides broad customization, ODM, and OEM services, including OEM support for recognized brands, and reports product development during the past year. Its business scope covers communication, security, electronic, and related equipment, with import and export permitted. Production and export capabilities are documented, including markets across multiple regions and a stated off-peak lead time within 15 working days. Service procedures, corrective actions, complaint handling, and finished-product inspection procedures are documented and followed. However, the supplier reports no available SDK, no in-stock service, and no overseas warehouse or showroom. The provided information does not establish certifications, financial strength, or specific customer cases.

Supplier typeThe supplier is explicitly classified as a manufacturer. Its described offerings cover manufacturing capacity, quality control, R&D, export trade, and related capabilities, supporting a direct manufacturing profile.

After-Sales capabilityThe supplier has written procedures and followed records for service assessment, corrective and preventive actions, and customer complaint handling. However, it reports no in-stock service capacity, overseas warehouse, or overseas showroom, indicating procedural service capability but limited stated overseas support infrastructure.

R&D capabilityThe supplier reports new products during the past year, offers ODM services, and supports customization from samples and designs. It does not have an available SDK, which limits the documented software-development interface capability, but this alone does not negate the stated product R&D evidence.

Production capacityThe supplier is a manufacturer operating three production lines and reports annual production quantities of 2,000,000 mobile signal boosters and 2,000,000 signal jammers, with a stated off-peak lead time within 15 working days. It also has valid manufacturing-capacity contracts with each associated subcontractor, although no in-stock capacity is available.

Customization capabilityBoth slices explicitly list customization from samples, designs, full customization, minor customization, and flexible customization. The supplier also reports ODM availability, providing direct evidence of broad customization capability.