J28V Handheld 28-Band Jammer – High Cooling Performance Full Band Signal Blocker (5G / WiFi 6E / FM)

The J28V is a handheld 28 frequency jammer designed for wide-spectrum RF blocking in a compact mobile form. It combines multi-band signal blocking capability with an upgraded thermal structure, making it suitable for continuous and stable operation in demanding environments.

Built as a next-generation Portable Handheld Jammer solution, it integrates 28 independently controllable channels covering modern wireless standards including cellular networks, WiFi, GPS, and radio blocking frequencies.

28-Band Full Spectrum Signal Blocking (5G / WiFi 6E / FM / GPS Jammer)

The J28V provides broad coverage across major communication systems used globally:

• 5G Cellular Jammer (low, mid, high bands)
• 4G LTE / 3G / GSM networks
• Jams WiFi 2.4GHz / 5GHz / WiFi 6E
• FM Radio Jammer (80–108 MHz)
• GPS Signal Blocking L1–L5
• UHF / VHF / LOJACK tracking signals
• RC control frequencies (315 / 433 / 868 MHz)
• LoRa and industrial RF signals

High Cooling Performance Design – Stable Output Under Load

The J28V is engineered with a focus on thermal stability. Unlike conventional model, it uses a reinforced cooling architecture to maintain consistent output during long operation cycles.

• Precision aluminum heat dissipation structure
• Four integrated high-speed cooling fans
• Optimized airflow channel for heat balance

This high cooling performance system significantly reduces overheating risk and ensures stable multi-channel operation.

Independent Channel Control with DIP Switch System

Each frequency band can be individually controlled using built-in DIP switches, allowing flexible configuration depending on operational requirements. Users can selectively enable or disable specific signal bands.

Portable Signal Jammer with Battery Operation

Designed for mobility, the J28V supports both portable and semi-stationary use scenarios.

• Built-in 12000mAh rechargeable battery
• Operating time: approximately 80 minutes
• Supports external 12V power supply (vehicle use)
• LCD display for real-time status monitoring
• Compact structure for easy transport

Technical Specifications

• Total output power: 28W (approx. 1W per channel)
• Effective range: 2–25 meters (environment dependent)
• 28 external high-gain antennas (192mm)
• Antenna gain: 1–3 dBi
• Power input: AC 110–240V to DC 12V
• Dimensions: 210 × 132 × 85 mm
• Weight: approx. 3.0 kg

28 Channel Frequency Overview for J28V

Channel	Frequency Range	Signal Type	Power
1	135–175 MHz	VHF / LOJACK	30 ±1 dBm (~1W)
2	617–698 MHz	5G Low Band	30 ±1 dBm (~1W)
3	3600–3900 MHz	5G NR	30 ±1 dBm (~1W)
4	2110–2180 MHz	3G / UMTS	30 ±1 dBm (~1W)
5	868 MHz	RF Control	30 ±1 dBm (~1W)
6	5100–5500 MHz	WiFi 5.2G	30 ±1 dBm (~1W)
7	2620–2690 MHz	4G LTE	30 ±1 dBm (~1W)
8	790–826 MHz	4G LTE	30 ±1 dBm (~1W)
9	80–108 MHz	FM Radio	30 ±1 dBm (~1W)
10	433–434 MHz	RC Signal	30 ±1 dBm (~1W)
11	700–803 MHz	4G LTE	30 ±1 dBm (~1W)
12	1560–1610 MHz	GPS L1	30 ±1 dBm (~1W)
13	900–930 MHz	LoRa / RF	30 ±1 dBm (~1W)
14	2500–2620 MHz	4G LTE	30 ±1 dBm (~1W)
15	1170–1390 MHz	GPS L2–L5	30 ±1 dBm (~1W)
16	851–894 MHz	CDMA	30 ±1 dBm (~1W)
17	1710–1780 MHz	4G LTE	30 ±1 dBm (~1W)
18	5925–6425 MHz	WiFi 6E	30 ±1 dBm (~1W)
19	315 MHz	RC Signal	30 ±1 dBm (~1W)
20	925–960 MHz	GSM	30 ±1 dBm (~1W)
21	1805–1920 MHz	DCS	30 ±1 dBm (~1W)
22	2400–2500 MHz	WiFi 2.4G	30 ±1 dBm (~1W)
23	5500–5900 MHz	WiFi 5.8G	30 ±1 dBm (~1W)
24	3300–3600 MHz	5G NR	30 ±1 dBm (~1W)
25	400–470 MHz	UHF	30 ±1 dBm (~1W)
26	1427–1518 MHz	5G Band	30 ±1 dBm (~1W)
27	1920–2000 MHz	PCS	30 ±1 dBm (~1W)
28	2300–2400 MHz	4G LTE	30 ±1 dBm (~1W)

Package Includes

• J28V Handheld Jammer Device
• 28 High-Gain Antennas
• AC Power Adapter
• 12V Car Charger
• Protective Carry Case

Important Notice

This product may be subject to regulatory restrictions depending on country or region. Users must ensure compliance with local laws before operation.