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SMa-818B Built-in Antenna Engineering 2G/3G/4G Mobile Signal Jammer/Mobile Isolator

SMa-818B Built-in Antenna Engineering 2G/3G/4G Mobile Signal Jammer/Mobile Isolator

Place of Origin : China(mainland)
Model Number : SMa-818B
Certification : ISO9001
Price : Negotiation
Packaging Details : EPE+Carton
Delivery Time : Depends on your Requirement
Payment Terms : T/T,Money Gram in advance
Supply Ability : 10,000
MOQ : Negotiation
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SMa-818B Built-in Antenna Engineering 2G/3G/4G

All System Mobile Signal Jammer


Applied in the Justice Sector(Prisons, detention centers, labor camp, police, courts, procuratorate);the Education Industry(School examination room, classrooms, dormitories, various social test sites, education and training institutions); Government agencies, administrative institutions meeting rooms; Factories and enterprises warehouses, workshops, production lines; Forces and confidential units, theaters, concert halls, memorial halls ,etc.

Technical Parameter

A:Jamming range: Radius: 10~60m (-75dBm, depending on the distance of base station)
B:Transmission power: The whole set: 18W at maximum, each channel 2~3W
C:Jammed signal type: 4G(TD-LTE, FDD-LTE), 3G(TD/WCDMA/CDMA2000), 2G:GSM 900(Mobile/Unicom 2G), CDMA(Telecom), DCS1800(Mobile/Unicom 1800M)
D:Increasable signal type: Wi-Fi, GPS, Bluetooth
E:Output channel: eight channels output


Eight modules work independently, RF power of each channel is 2~3W;
Effectively jamming Mobile, Unicom and Telecom all 2G/3G/4G signals;
Particularly strengthened the power of push for 3G/4G, in full assurance of per channel output power at least 2W;
Industrial switch power supply, with precision voltage regulator circuit, to ensure the normal work of the host;
Fully sealed protective casing design, waterproof, dustproof, prevent from sabotage and other questions in special application field;
Excellent ventilation performance, with auto temperature controlled cooling system, make sure stable work of the device;
Stable performance, long service life;
Harmless to human body;
Extension interface with the function of intelligent networking linkage, networking way: power carrier + wireless, or by RS485 or CAN BUS;

Main Parts

Detailed Technical Parameter

Band Parameter



Average output power



























Total weight


Ambient temperature


Relative humidity


Power consumption


Power input

AC 100V-240V

Power output

V1:5V/15A V2:12V/2A

Installation height


Installation mode


Enclosure material

ABS plastic molding injection


Jamming range is closely related to the signal strength in the field and may be affected by the system of mobile phone;
Factors that affect jamming range include but not limited to: distance of base station, jammer’s orientation, obstacles, wall’s material quality, jammer’s installation height and mode, etc;
Strictly factory test, like aging test. When client receives the machine, please check whether there are something wrong with our device in transit, such as parts fall off , and contact with dealer or manufacturer, for repairing timely;
Installation height is recommended to be 1.8 to 2.5 meters. Install in areas with no obstructions between the target positions. Antenna must be vertical, or antenna is vertical upright on the desktop after breaking off 90 degree, make sure no AC power lines or other audio and video line around antenna in range of 0.2 meters;
In order to avoid possible interference with some electronic devices during use, keep the following common device away from 1 to 2 meters: audio, wireless microphones, radios, computers, TV, Wi-Fi routers, etc.;

The Motherboard Design

The RF channel modular and each channel work individually
All the motherboard components are used SMT technology
All components are new and original


1,Exclusive power amplifier heat sink, large heat dissipation base design

a:Exclusive power amplifier chip heat dissipation, improve efficiency, extended service life
b:Heat produced by power amplifier can conduct to heat sink rapidly
c:270x100x47mm large heat dissipation base
d:Maximum the heat dissipation area on limited space

2,Built-in cooling fans, strengthen the circulation between cold flow and heat flow

a:Large and thick ventilation base, absorb and conduct heat produced by power amplifier rapidly and effectively
b:The air inlet promote the air convection
c:40x40mm silent big blade cooling fans, almost no wind noise

3,High-quality metal shell switch power supply


output:DC5V/15A 80W;


impact current: 50A/AC220V;

over-current/over-voltage protection:≥125%;

industrial switch power supply,complied CE,FCC;

protection style:short circuit protection,over-load protection,over-voltage protection;

power supply customized by famous manufacturer;

Al alloy shell, good cooling performance;



Regular power adapter:

Small size, low cost;

Fully sealed by plastic shell,discharge internal heat difficultly;

High failure rate, difficult to check and repair;

Short service life,like power consumption redundancy is lacking, service life will be less than 1 year;

OEM Customized Service

Frequency spreading can be done for Wi-Fi, Bluetooth, Intercom and wireless data transmit etc.
More than 50 units can provide screen printing OEM service.
Provide neutral device.

Engineering Application

In engineering application, there are reserved hanging mounting holes on the top of machine, mounted on the wall directly.
a:The height of hanging hole is 16mm, to ensure the space between device and wall for ventilation
b:Silent fans on both sides of device, strengthened to cool the host and power supply
c:Built-in antenna protect it from personnel sabotage
d:Internal power supply protect it from sabotage and malicious power off
e:Waterproof design, available installation both inside and outside

Field Application

Product Tags:

All Mobile System Signal Jammer


2G/3G/4G Signal Jammer


Builr-in Antenna Signal Blocker

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