SPECIFICATIONS

3 Band Network: 2g 3g 4g signal network

Automatic Level Control: ALC Control makes longer life

B1B3B7B8B20: 2100 1800 2600 900 800MHZ

B1B3B7B8B28: 2100 1800 2600 900 700MHZ

Big Coverage: 600sqm without barried

Brand Name: Callboost

CB65G 3-Band Frequency: frequency available for selection

Callbosot Signal Booster: Band cellular signal amplifier

Certification: CE,RoHS

Communication: Internet 2g 3g 4g network LTE internet for phone,Internet 2g 3g 4g network LTE internet for phone

For Operators: STC,Zain,Mobily,Cellon,Partner,Omantel,Viva,etc

GSM amplifier: Mobile signal amplifier cellular repeater

Gain(dB): 70dB

High Gain: 70dB

High Power Network Booster: Strong improve 2G 3G 4G signal

High-concerned chemical: none

Improvement: Improve GSM 2G/3G/4G HD call voice & network

Model Number: CB70B5

Origin: Mainland China

Output Power: 20dBm

Suitable for: Saudi Arabia, Kuwait, United Arab Emirates, Bahrain, Oman, Israel, and many more

  -Callboost NEW 5 BAND BOOSTER-  

One 5-band booster = full bars for everyone!

1 DEVICE ≥ 5 PIECES OF SINGLE-BAND BOOSTERS

B1B3B7B8B20(2100 1800 2600 900 800MHZ)

B1B3B7B8B28(2100 1800 2600 900 700MHZ)

70dB High Gain,20dBm Great Power

No Frequency Check Required

Universal Signal Booster，For All Mobile Carriers, Phones

Self-Built Elite Chips, Always AdvancingWidely Used
Think of it as a signal-boost wizard: even the pokiest corners—lifts, basements, that back bedroom—suddenly get five-bar 2G/3G/4G. Stream, game, scroll without a stutter.

Works With Almost All Operators

Penta-Band Coverage: Simultaneously amplifies all five key frequency bands, seamlessly boosting 2G, 3G, and 4G signals for virtually every carrier—universal compatibility across networks.8 Funtions Make BOOSTER Perfect

FEATURES

lReal-time isolation detection function

Start detection and alarm when isolation is not sufficient;

lSelf-excitation elimination function

Automatically reduce the gain when the device self-excitation by not enough isolation;

lAutomatic shutdown function

Auto shuts down the output when severe self-excitation or overload, to avoid equipment damage;

lUplink sleep function

The device enters sleep state when there is no user in the coverage area, reducing interference to the base station;

lALC function

Automatic power control function to keep the signal stable;

lLow noise & low radiation

The amplifier works with low noiseandlow radiation,which can effectively protect your health;

lCast aluminum chassis & ice-metal material

Adoptsa cast aluminum chassis and ice-metal materialhelps cooling, and the outer casing absorbs heat discharge, which is durable and safe;

lLCD display

Clearly show the real-time signal strength and equipment operation parameters;

Auto Sleep Function

Turns off unnecessary signal transmissions when the user is sleeping, significantly reducing device power consumption and extending product lifetime

ALC Function

Enjoy strong and stable signals with our ALC function! It automatically adjusts the output power for consistent coverage. Say goodbye to fluctuating signals at home or in the office, and enjoy smooth calls and internet browsing!

Anti-Interference Technology

✅ Strong anti-interference

✅ Pure signal

✅ Stable communication in complex environments

Works With Almost All Operators

Penta-Band Coverage: Simultaneously amplifies all five key frequency bands, seamlessly boosting 2G, 3G, and 4G signals for virtually every carrier—universal compatibility across networks.

No CALL ...? NO SIGNAL...? NETWORK JAM..?

Callboost signal booster

CAN HELP YOU.Multiple devices online, no speed drop8 Funtions Make BOOSTER PerfectFEATURES

lReal-time isolation detection function

Start detection and alarm when isolation is not sufficient;

lSelf-excitation elimination function

Automatically reduce the gain when the device self-excitation by not enough isolation;

lAutomatic shutdown function

Auto shuts down the output when severe self-excitation or overload, to avoid equipment damage;

lUplink sleep function

The device enters sleep state when there is no user in the coverage area, reducing interference to the base station;

lALC function

Automatic power control function to keep the signal stable;

lLow noise & low radiation

The amplifier works with low noiseandlow radiation,which can effectively protect your health;

lCast aluminum chassis & ice-metal material

Adoptsa cast aluminum chassis and ice-metal materialhelps cooling, and the outer casing absorbs heat discharge, which is durable and safe;

lLCD display

Clearly show the real-time signal strength and equipment operation parameters;

Self-Built Elite Chips, Always Advancing

Widely Used

Fixes Signal Everywhere

Effortlessly resolves signal issues in multiple rooms of the home

Up to 800 SQM without wear and tear

Innovative Signal OLED Display

Effortless Adjustments: Customize your outdoor antenna settings based on real-time data feedback.

Auto Sleep Function

Turns off unnecessary signal transmissions when the user is sleeping, significantly reducing device power consumption and extending product lifetime

ALC Function

Enjoy strong and stable signals with our ALC function! It automatically adjusts the output power for consistent coverage. Say goodbye to fluctuating signals at home or in the office, and enjoy smooth calls and internet browsing!

Product Detail

- PACKAGE LIST -

1.Callboost BOOSTER

2.USB adaptor（EU/US/AU/UK Plug,please choose!）

3.Instruction manual

* Each with 1pcs.

INSTALLATION STEP

Be a Trusted Partner in Signal Amplification

Our Expertise & Certifications for Your Reliable Mobile Signal Booster.

Our extensive expertise and a wide array of industry - recognized certifications, such as CE and RoHS, position us as your reliable partner. Buying our relay mobile phone amplifier means you get a product that meets top - notch safety and quality standard.

HOW TO CHOOSE THE SUITABLE BOOSTER

How strong is the OUTDOOR signal?
Please make sure that you can receive at least 2 bars signal in the place where you plan to install the outdoor antenna.

Note:Please Off Wifi to display the network type at the top of the screen.
If it shows "0" or "unknow",please test more times outside at the signal strongest position.

Shipping

● We will send your parcel as per your choice of logistics as soon as posiible after payment confirmed, within 48 hours for normal,Except weekend and Chinaese holidays.

If you want another shipping way,please feel free to contact us,we will provide the most suitable shipping for you.

● Please provide your correct address,full name,and zip code.

● Tariff is an obligation that citizens of every country should fulfill. It is buyers responsibility to pay for the tax and custom clearance.

● If you do not receive the parcel within the protection time, please contact us at the first time, we would check it for you or extend the protection time.

After-sale service

● Please note that we always check and test the product twice before shipping and pack them well as far as possible. However we could not control anything during the long transit. Therefor, the product is broken at receiving, please contact us, we would resend you a new one.

● Our product have one year warranty. But please be cooperative to provide video or pictures to show exact the problem, and listen our suggestions for the installation.

● Any problem about the parcel or the prodcut, please feel free to contact us at the first time, we would be very glad to help and reply ASAP.

Feedback

● If you are satisfied with our service and product, we would be very appreciated that you put us five star and positive review. You could also recommend it to people who needs it. We would present coupon as little gift to you for thanks.

● For any reason you are not pleased with us, please contact us before left a neutral or negative feedback, we will do the best to solve you problem as soon as possible.