In today's highly technological society, jammers (such as signal blocker device, GPS jammers, etc.) are widely used in military, security, exam anti-cheating and other fields due to their special functions. However, the market is flooded with a large number of false advertising products, and consumers often find it difficult to distinguish the authenticity when purchasing. This article will deeply analyze the key points of purchasing jammers to help consumers identify false advertising and avoid falling into the marketing traps of merchants.
Basic types and uses of jammers
Before purchasing a jammer, you must first clarify your needs, because different types of jammers are suitable for different scenarios:
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Wi-Fi/Bluetooth jammer: used to block wireless signals in specific areas to prevent information leakage.
Mobile phone signal blocker: commonly used in examination rooms, conference rooms and other places to prevent the use of communication equipment.
GPS jammer: mainly used to prevent vehicles or equipment from being tracked.
UAV jammer: used to counter illegal intrusion of drones.
Different jammers have different technical principles and power requirements, so when purchasing, you should choose the right product according to the actual use.
Common routines of false propaganda
The UHF VHF signaljammer products on the market are of varying quality, and many merchants use consumers' lack of understanding of technical parameters to conduct false propaganda. The following are several common marketing scams:
1. "Full-band coverage, 100% shielding"
Problem: No jammer can truly achieve "full-band 100% shielding" because the communication frequency bands in different countries and regions are different, and the signal strength is affected by the environment (such as building obstruction).
Correct judgment: Pay attention to the frequency band range supported by the product (such as 2G/3G/4G/5G, Wi-Fi 2.4GHz/5GHz, etc.), and check whether there is actual measured data support.
2. "Ultra-long distance, kilometer-level interference"
Problem: The interference distance is affected by equipment power, antenna gain and environmental factors. The effective range of ordinary civilian jammers is usually within tens of meters.
Correct judgment: Check the actual output power of the product (such as dBm or W) and refer to the feedback from real users.
3. "Military-grade technology, cannot be detected"
Problem: Real military signal jammer are strictly controlled and cannot be sold at will by ordinary merchants. Many merchants just use "military-grade" as a gimmick, and the actual performance is no different from civilian products.
Correct judgment: Check whether the product has formal certification (such as FCC, CE, etc.) and verify the manufacturer's background.
4. "Lifetime warranty, never damaged"
Problem: Electronic equipment has a service life, and jammers are prone to damage when running at high power for a long time. The so-called "lifetime warranty" is often a marketing rhetoric.
Correct judgment: Pay attention to the warranty period (such as 1-2 years) and check the specific terms of after-sales service.
Key indicators: How to judge the true performance of the jammer?
In order to avoid being misled by false propaganda, consumers should focus on the following technical indicators when purchasing:
1. Frequency band coverage
Different communication standards (such as 4G, 5G, Wi-Fi) use different frequency bands, and the jammer must support the target frequency band to work effectively.
Example:
4G signals mainly cover 700MHz-2600MHz
Wi-Fi signals are mainly at 2.4GHz and 5GHz
Suggestions for avoiding pitfalls: Check the product manual to confirm whether the frequency bands it supports meet the requirements.
2. Output power and effective distance
The effective distance of the jammer depends on the output power (unit: dBm or W). The higher the power, the larger the coverage, but the higher the energy consumption and heat generation.
Example:
Low power (below 1W): suitable for small range (10-30 meters)
Medium and high power (above 5W): suitable for large range (50-100 meters)
Suggestions for avoiding pitfalls: Avoid buying products with the nominal "kilometer-level interference" but extremely low power.
3. Heat dissipation and stability
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GPS jammers will heat up after long-term operation, and poor heat dissipation may cause equipment damage.
Suggestions for avoiding pitfalls: Choose products with cooling fans or metal shells, and avoid products with plastic bodies and no heat dissipation design.
How to avoid buying inferior jammers?
Don't be greedy for cheapness: Low-priced jammers (such as less than 100 yuan) usually have insufficient power or incomplete frequency bands, and basically cannot meet the needs.
Choose formal channels: Purchase first from official malls or authorized agents, and avoid purchasing from unknown e-commerce platforms.
Request technical documents: Request merchants to provide detailed technical parameters and test reports.
Trial period guarantee: Choose products that support 7-day unconditional return and exchange, so as to test the effect in practice.
Summary: Core principles for purchasing jammers
Clear requirements: First determine the type of signal you want to block (such as mobile phones, Wi-Fi, GPS, etc.).
Look at parameters, not advertisements: Focus on hard indicators such as frequency band, power, and heat dissipation.
Check certification and reputation: Give priority to products with formal certification and good reviews from real users.
Beware of exaggerated propaganda: Be skeptical of claims such as "100% shielding" and "military grade".
Through the above methods, consumers can effectively identify false propaganda, purchase jammers that truly meet their needs, and avoid wasting money and time. I hope this guide can help everyone make wise choices in a complex market!
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