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2G 3G 4G Tri Band Repeater

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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2G 3G 4G Tri Band Repeater

2G 3G 4G Tri Band Repeater
2G 3G 4G Tri Band Repeater 2G 3G 4G Tri Band Repeater 2G 3G 4G Tri Band Repeater

Large Image :  2G 3G 4G Tri Band Repeater

Product Details:
Place of Origin: China
Brand Name: ATNJ
Certification: CE,ROHS,CCC,TUV,BV, ISO
Model Number: JS-DB900/1800/2100
Payment & Shipping Terms:
Minimum Order Quantity: 1
Price: USD+240---260+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.

2G 3G 4G Tri Band Repeater

Frequency Range: According To Customer's Need,(Band1) 2100MHz -- Uplink Frequency: 1920-1980MHz/Downlink Frequency : 2110-2170MHz (Band 3) 1800MHz -- Uplink Frequency: 1710-1785MHz/Downlink Frequency : 1805-1880MHz (Band 8) 900MHz -- Uplink Frequency: 890-915MHz/Down Gain: 70dB
Output Power: 20dBm Color: Black ,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 Packing Size: 52x21x16cm

2G 3G 4G Tri Band Repeater


2100MHz Tri Band Repeater


2100MHz Cellular Amplifier

2G 3G 4G Tri Band Repeater


Full intelligent 2G 3G 4G Mobile Signal Booster 900/1800/2100MHz Cellular amplifier GSM LTE signal repeater kit






GSM 900MHz



4G 1800MHz



3G 2100MHz



Max. Gain



Max. Output Power




Wide Band

Ripple in Band

≤ 8dB

Noise Figure

≤ 6dB


≤ 2.0

Spurious Emission


≤ -36dBm


≤ -30dBm

Time Delay

≤ 1.5 μs


> 50000 hours


50 ohm

Power Supply

AC 90-240V,DC 5V/3A

Power LCD

Power indicator

Alarm LCD


Strong input signal



Mechanical Specification

RF Connector



Heatsink Convection cooling


< 90%

Operating Temperature

-10°C ~ +55°C

Environment Conditions


Installation Type

Wall Installation



Gross Weight



Further detail pls click here for downloading the products specification:

900+1800+2100MHz A033 RF Repeater.pdf


Selling Point

2022 new upgraded Micro power smart single band signal repeater for residential use with WIFI monitoring and control function, it could cover 100- 300sqm (standard kit), and could support max 2 to 3 indoor antennas to cover over 800sqm. Analog repeater and Digital(Customized Selected Band) repeater for choice.


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
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2G 3G 4G Tri Band Repeater 102G 3G 4G Tri Band Repeater 112G 3G 4G Tri Band Repeater 122G 3G 4G Tri Band Repeater 132G 3G 4G Tri Band Repeater 142G 3G 4G Tri Band Repeater 15


We are manufacturer, and have our own factory.


Q1. Could I get a sample before bulk order?

Yes, we offer the sample for all models but charged.

Q2. What should I do if I don't know about frequency in my country?

This model is suitable for Asia, Europe, The Middle East, and Brazil, etc.

*For more details please contact us directly.


Q3. Do you accept OEM/ODM order?
Yes, we can customize the brand logo, colors, and frequencies.


Q4.Payment Method
T/T, Western Union, Paypal, and Credit Card are available,
but we suggest paying by Alibaba Trade Assurance, the most favor, and security method.
*Other methods please contact us with more details.


Q5.Shipment Date


1-3 business days

<50 pcs

7-15 days

50-100 pcs

15-24 days

>100 pcs


Q6: Delivery Date of the sample by DHL/FedEx


3-5 days

Middle East/Latin American

3-6 days


5-7 days



Contact Details
Shenzhen Atnj Communication Technology Co., Ltd.

Contact Person: Angel Wang

Tel: +8615989511440

Fax: 86-755-86136774

Send your inquiry directly to us (0 / 3000)