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70dB Dual Band Signal Booster 2G 3G 4G

China Shenzhen Atnj Communication Technology Co., Ltd. certification
China Shenzhen Atnj Communication Technology Co., Ltd. certification
Customer Reviews
Good service and fast delivery

—— Aki Vaattovaara,Sweden

It arrived in time I am very satisfied with the support. The product si in very good conditions. I proved it and works very well.

—— JC Saavedra Libia,Peru

I an very satisfied with the Quality of the product. Also the miss that support me is very kind. she resolved all my doubts perfectly. the product arrived at time as usual.

—— JC Saavedra Libia,Peru

Ms Anne Wang works hard to provide very good service for customers. A pleasure to deal with. Product is as described and good value for money.

—— Lindsay Pettigrew,Australia

Excellent product as describe. Very good seller ! 100% recommended, 100% satisfied ! shipping very fast to Cambodia.

—— loem kom,Cambodia

I have received the repeater in 5/6 days, it is a robust case repeater, it looks nice, and it work perfectly. I suggest this brand repeater. good work

—— andrea cristofanini,Italy

получил товар. качество и параметры сответствуют описанию. продавец молодец!

—— akbar karaev,Uzbekistan

Super fast delivery and superb service/help from supplier. I haven't had a chance to try out the product but I am confident it will work fine. If not, the supplier is really helpful and I am sure he will assist me with futher installation details

—— Attila Kinkopf,United States

I haven't used the product yet but it looks like a quality product. Wave Luo was very helpful, thank you very much!!!!

—— Shephard Mack,South Africa

ATNJ, You got good products with good services, fast and easy to communicate.

—— Borin SIM,Cambodia

Gracias excelente productos y el envío muy rápido


Very technical and very welll organized and professional. Andrew has been a very helpful salesperson

—— gabriel haddad,Venezuela

Excelent product antennas and power.. its good, working very goog thanks ATNJ,

—— CARLOS GREGORIO,United States

Let’s be honest, the quality of my Vodafone mobile signal at home always left much to desire. I just was too lazy to do anything with it. I was absolutely satisfied with the rates and the quality of the signal that I had everywhere and my own house was an exception. However, the coronavirus pandemic changed everything. I started to spend much more

—— Ali , Spain

I bought this booster for my apartment because I was absolutely dissatisfied with the power of GSM and 4G signals that I had there. But now the situation has changed. Thank you for this booster, I finally don’t feel isolated when I stay at home alone.

—— Abdul Mohammed,Germany

I think that’s a very nice solution for those who suffer from problems with voice services and mobile internet and do not want to create any antennas or smth like that themselves. The price is absolutely fair and the quality is amazing.

—— Lena W.,Finland

I was very happy to see the discount that you offered. I know that quite often companies make discounts on goods that are not popular but in this case, I see that the situation is quite opposite. I like that this device is able to improve calls and the internet speed at the same time.

—— Giulia M.,Austria

Thank you! The booster is super cool for a private house. All the rooms are now covered with the improved signal. Now I can’t understand why we haven’t bought it earlier.

—— Nadine Nacht ,Germany

It’s a very cool booster! Thank you, dear team, for your attention to your clients’ needs and the prices that you offer. You are the best, ATNJ

—— Natalia L.,Norway

My 3G and GSM connection used to leave much to desire. But with m new booster I have practically forgotten all these problems. I really like that this device is so compact but so powerful. Thanks, guys, for your amazing work and fast delivery.

—— Goran N. ,Sweden

I can’t understand why I bought this repeater only 2 months ago and not earlier. That’s a very useful device for those who live in a rural area like my family. The improved quality of connection has significantly improved the quality of our life.

—— Lars M. ,United States

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70dB Dual Band Signal Booster 2G 3G 4G

70dB Dual Band Signal Booster 2G 3G 4G
70dB Dual Band Signal Booster 2G 3G 4G 70dB Dual Band Signal Booster 2G 3G 4G

Large Image :  70dB Dual Band Signal Booster 2G 3G 4G

Product Details:
Place of Origin: China
Brand Name: ATNJ
Certification: CE,ROHS,CCC,TUV,BV, ISO
Model Number: JS-DB1800/2100
Payment & Shipping Terms:
Minimum Order Quantity: 1
Price: USD+100---120+kit
Packaging Details: Standard neutral packing,52x21x16cm(1 kit), 4kits as 1 carton(53x49x42cm)
Delivery Time: 3-5 work days
Payment Terms: T/T, Western Union,Paypal,Alibaba,Bank transfering.
Supply Ability: 1000+unit+per day.

70dB Dual Band Signal Booster 2G 3G 4G

Frequency Range: According To Customer's Need,(Band 1)2100MHz -- Uplink Frequency: 1920-1980MHz/Downlink Frequency :2110-2170MHz (Band 3)1800MHz -- Uplink Frequency: 1710-1785MHz/Downlink Frequency : 1805-1880MHz Gain: 70dB
Output Power: 20dBm Color: Gold Or Black Or White Or Cuztomized
AGC Intelligent Function: Done,31dB @ 1dB/ Step ALC Intelligent Function: Done
MGC: Done In-band Ripple: ≤ 3dB
VSWR: <=2 Noise Figure: ≤ 5dB
System Delay: ≤ 5μs RF Connect Type: N/Female
Power Supply: AC 110~220V±20%, 50/60Hz(AC 220V/ DC5V/2A Power Adapter) Inter-Modulation Attenuation ACPR: ≤ -40dBc / 30kHz (measured Under Rated Output Power)
Weight: 3.5kg Warranty: 3 Years

70dB Dual Band Signal Booster


20dBm Dual Band Signal Booster


70dB Signal Booster 2G 3G 4G

70dB Dual Band Signal Booster 2G 3G 4G


Dual Band Signal Booster 70dB Gain 2G/3G/4G 1800/2100MHz Mobile Signal Repeater Amplifier




A mobile phone signal repeater provides the ultimate solution in any area where celluar commnuications cannot work well due to leak of signals.The repeater device features easy installation and operation,build-in door antennaand no could also improve indoor electromagnetism enviroments,protract cellular battery life and reduce radiation of cellphones.A mobile phone repeater is ideal use for house,home,office use.


Technical Specifications



Frequency Range (Customers to Choose)





Frequency Bandwidth (3dB Bandwidth)




Automatic gain control (Step Attenuation)

31dB @ 1dB/ Step

Auto Gain Control

20dB Min.

Output Power(Customers to Choose)


Spurious Emission

≤ -15dBm/30kHz

9kHz~1GHz: ≤ -36dBm/30kHz

1GHz~12.75GHz: ≤ -30dBm/30kHz

Inter-Modulation Attenuation ACPR

≤ -40dBc / 30kHz (measured under rated output power)

In-band Ripple

≤ 3dB



I/O Impedance

50 Ω

Noise Figure

≤ 5dB

System Delay

≤ 5μs

RF Connector(Customers to Choose)


Operating Temperature

Operation: - 10°C ~ + 55°C / Storage: -20°C ~ +60°C

Power Supply

AC 110~220V±20%, 50/60Hz(AC 220V/ DC5V/2A power adapter)


165*130*40 (mm)


≤0.8 kg(Net)

Alarm Monitoring System

Alarm for uplink self-oscillation

Indication LED

Power supply

Further detail pls click here for downloading the products specification:

1800+2100MHz A032 mobile signal repeater.pdf


Selling Point


1. Intelligent to guide the installation with LCD

2. Real time display the signal strength.

3. Automatic dormancy when no user make the calling

4. Automatic alarm when installation mistake and provide the according solution

5. Automatic adjust the system gain to avoid the repeater self-excitation

6. Initiative reminding when the device was damaged.



Product Description


Technique supporting:


1. If still no signal receipt after activated repeater,please check if outdoor antenna point to signal tower or elsewhere have strong signal and check if strength achieve -70dBm.


2. If cannot call out,please adjust the direction of outdoor antenna.


3. If the strength is not steady,please check if outdoor and indoor antennas are too close;please ensure the outdoor antenna and indoor antenna have distance of 20meters at least,with a wall between and not in a same horizontal line.





1. One dual band signal booster;


2. One indoor antenna;


3. One outdoor antenna;


4. 20 meter cable and 5 meter cable;


5. User manual;


6. power adapter.


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70dB Dual Band Signal Booster 2G 3G 4G 1070dB Dual Band Signal Booster 2G 3G 4G 11

70dB Dual Band Signal Booster 2G 3G 4G 1270dB Dual Band Signal Booster 2G 3G 4G 1370dB Dual Band Signal Booster 2G 3G 4G 1470dB Dual Band Signal Booster 2G 3G 4G 1570dB Dual Band Signal Booster 2G 3G 4G 16





Q: Why choose us for cooperation?

A: We have the professional engineer to develop and make them suit for all over the world.we also will deal with all the problem when you have problem and reply to you at any time.



Q: Does the signal booster work have radiation or not ?

A: Yes,but just little ,it also can reduce the radiation when you calling ,because it will have more radiation if no signal when you dialing on your phone.So don’t worry and use in house ,it is better for you than not use when no signal in house.



Q: Can I install a signal repeater myself?

A: Absolutely. There is no technical expertise required to install your mobile signal repeater kit. Each kit contains everything needed to improve the mobile coverage in your home/office and includes instructions that will guide you through the simple steps necessary to install your repeater.



Q: Can this mobile signal repeater create a signal where there is no cell signal before?

A: The mobile signal repeater cannot produce a signal, only amplify a weak one.



Q: The cable supplied from outdoor antenna to the signal booster is 15m in your recommended kit. Can a longer cable be used without affecting performance?

A: The cable length is optional. We can supply cable length per your requirement. But unfortunately, longer cable do effect on the performance, for bigger gain loss during signal transmission.

Contact Details
Shenzhen Atnj Communication Technology Co., Ltd.

Contact Person: Angel Wang

Tel: 15989511440

Fax: 86-755-86136774

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