FREE ENGINEERING SIGNAL SOLUTION CUSTOMIZED

We offer 30,000+ complimentary signal layout solutions, custom-tailored for 10,000+ clients. Our team of 10+ senior engineers designs signal schemes with precision and expertise, delivering bespoke services.

STAND STRICTLY TESTED BY ANYONE, GETTING HIGH REVIEWS

Products undergo rigorous R&D, high-tech manufacturing, stringent testing, and factory aging to ensure stable signals. Quality is our priority, with every unit passing strict checks, earning us high praise.

QUALITY CONTROLLED PRODUCTS

Every phone signal booster undergoes meticulous testing at every stage - R&D, production, calibration, and dispatch - using specialized equipment. 

We craft superior repeaters from top-quality materials to combat weak signals effectively.

CALLBOOST STRICTLY TESTED	CUSTOMERS VERIFICATION

-Callboost CB75B Quad Band 2g 3g 4g High Gain Cell Phone Signal Repeater Support These Frequency Band.

CB75B CELL PHONE SIGNAL REPEATER HELP YOU CONNECT TO NETWORK AND MAKE HIGH QUALITY PHONE CALL

Emails us to get code for checking CB75B specification

The CB75B signal booster is characterized by its impressive 75dB high gain and 27dBm output power, coupled with advanced features such as Automatic Gain Control (AGC), Manual Gain Control (MGC), and Isolation Detection And Elimination (ISO) compatibility. It is capable of supporting all non-overlapping single, dual, triple, quadruple, and pentaband signals (B1 through B5, B7 through B8, B12, B20, B28, and N78) for seamless connectivity across a wide range of 2G, 3G, 4G, and 5G networks in most countries in South America, Africa, the Middle East, Southeast Asia, Europe, and beyond.

The CB75B signal booster boasts a robust cast-aluminum chassis, designed for efficient heat dissipation, coupled with a sleek and attractive design. Its simple structure and user-friendly installation make it easy to set up and maintain, ensuring a high gain and high output power, capable of providing coverage across varying square-meter areas. As such, it represents the perfect solution for enhancing mobile phone coverage in residential zones, industrial facilities, shopping malls, supermarkets, and many other locations.

AGC BOOSTS SIGNAL STABLY

Increase 20X longer lifespain

AGC ensures stable signal amplification, extending the device's lifespan by 20 times. It automatically adjusts the output power in response to input power fluctuations, maintaining a smooth signal output. In case of excessive input, the AGC activates, changing the indicator light to orange or red, and the booster's output power is regulated through gain modulation.

MGC AVOIDS INTERFERING TO BASE STASTION

1dB per step, adjustable gain within 31dB.

Manual Gain Control allows for adjusting the gain by manually pressing a button, offering more convenience than traditional dial switches. This ensures that the mobile phone signal repeater doesn't interfere with the base station.

ISO ALARM

SELF-EXCITED ELIMINATION

Our signal booster detects real-time isolation and alerts accordingly, capable of self-resolving issues. It automatically reduces gain when insufficient isolation causes self-excitation.

AUTOMATIC SHUIDOWN FUNCTION

Uplink Sleep Function

1. Callboost phone signal booster features an automatic output shuidown mechanism in case of sereve self-excitation or overload,preventing any potential damage to the device.

2. Our mobile signal repeater intelligently powers down when no users are present in the coverage area,minimizing interference to the base station.

As the original creators and patent holders, CALLBOOST remains at the forefront of innovation. 

We continuously upgrade our CB75B-based signal boosters to meet evolving needs.

-Why Everyone Choose Callboost Signal Booster Manufacturer?

-Callboost is majored in weak signal enchancing over 20 years and 100% solving your signal problem.

-Callboost CB75B quad band cellular signal booster can solve many signal problems easily.

-Callboost 2g 3g 4g four band signal booster cover your home signal without blind area easily.Our mobile phone signal boosters all have one year warranty.

-High Gain Power easy to cover over 600-1000m2 and easy to install.Other suppliers don't have such high gain power quad band signal booster,but Amplitec is the most professional repeater manufacturer in the world.CB75B quad band support four operator frequency at the same time,and keep the 75dB 27dBm in great power.

-Callboost signal booster is wide-used in House home,office,building,club,all indoor coverage project.

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7D-FB / LMR400 Coax Cable

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