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70dB Mobile 3G Repeater Dual Band 900MHz 2100MHz Android Iphone

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 Mobile 3G Repeater Dual Band 900MHz 2100MHz Android Iphone

70dB Mobile 3G Repeater Dual Band 900MHz 2100MHz Android Iphone
70dB Mobile 3G Repeater Dual Band 900MHz 2100MHz Android Iphone
70dB Mobile 3G Repeater Dual Band 900MHz 2100MHz Android Iphone 70dB Mobile 3G Repeater Dual Band 900MHz 2100MHz Android Iphone 70dB Mobile 3G Repeater Dual Band 900MHz 2100MHz Android Iphone

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Product Details:
Place of Origin: China
Brand Name: ATNJ
Certification: CE,ROHS,CCC,TUV,BV, ISO
Model Number: JS-DB900/2100
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: 2 work days
Payment Terms: T/T, Western Union,Paypal,Alibaba,Bank transfering.
Supply Ability: 1000+unit+per day.

70dB Mobile 3G Repeater Dual Band 900MHz 2100MHz Android Iphone

900MHz Frequency Range: 890-915MHz / 935-960MHz 2100MHz Frequency Range: 1920-1980MHz / 2110-2170MHz
Products Type: 3G Signal Repeater Gain: 70dB
Output Power: 20dBm Color: Gold , Black , White Or Customized
Warranty: 36 Months
High Light:

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70dB Mobile 3G Repeater Dual Band 900MHz 2100MHz Android Iphone


70dB Gain Metel Dual Band 2G 3G 4G Signal Booster 900/2100MHz Repeater Amplifier



The 900 / 2100MHz Pico Repeater provides an affordable solution to solve the indoor signal coverage problems due to signal fading and attenuation caused by architecture obstacles. And its easy installation and maintenance can help carrier get fast return.
The repeater is working as a relay between the BTS and mobiles. It picks up the strongest signal from BTS via the Donor Antenna, linearly amplifies the signal and then retransmits it via the Indoor Signal Distribution System to the weak/blind coverage area. And the mobile signal is also amplified and retransmitted to the BTS via the opposite direction.


Technical Specifications

Specifications Parameters
Frequency Range (Customers to Choose) Uplink 890-915MHz, 1920-1980MHz
Downlink 935-960MHz, 2110-2170MHz
Frequency Bandwidth (3dB Bandwidth) 25MHz&60MHz
Gain 70dB
Automatic gain control (Step Attenuation) 31dB @ 1dB/ Step
Auto Gain Control 20dB Min.
Output Power(Customers to Choose) 20dBm
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
VSWR <=2
I/O Impedance 50 Ω
Noise Figure ≤ 5dB
System Delay ≤ 5μs
RF Connector(Customers to Choose) N(Female)
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)
Dimensions 165*130*40 (mm)
Weight ≤0.8 kg(Net)
Alarm Monitoring System Alarm for uplink self-oscillation
Indication LED Power supply



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.


Please Check Frequency before Buying How to check?


- Android mobile phone
Download App called < Network Cell Info Lite >
The App will tell the number of LTE band

- Iphone
Dial *3001#12345#*
Clink Cell Serving Info
Check Freq Band Indicator, the number is LTE Band



LCD Display 2G 3G 4G Dual Band Repeater 1800/2100MHz Cellular Signal Amplifier Kit 1




Product Description



With ALC AGC Function

Can control gain automatically. Avoid base station interference

(Band 8) 900MHz -- Uplink frequency : 890-915MHz/Downlink frequency : 935-960MHz

(Band 1) 2100MHz -- Uplink frequency : 1920-1980MHz/Downlink frequency : 2110-2170MHz


Network support : GSM 2G + WCDMA 3/4G




70dB Mobile 3G Repeater Dual Band 900MHz 2100MHz Android Iphone 1
70dB Mobile 3G Repeater Dual Band 900MHz 2100MHz Android Iphone 2



Signal booster could be used for both phone calls and the latest LTE network at the same time. There is no limit to the number of mobile devices that can benefit from the improved internet.


You get all the accessories for installation and you don't need to buy anything else. Installation is simple and quick - it takes about half an hour and no special knowledge is required.


1. Dual Band Booster

2. 20 meters cable

3. 5 meters cable

4. Indoor Ceiling antenna

5. Outdoor Log-periodic antenna

6. Power adapter



70dB Mobile 3G Repeater Dual Band 900MHz 2100MHz Android Iphone 3



The repeater makes the signal stronger in places with poor signal coverage such as:


1) Underground areas: basements, parking lots, tunnels;


2) Other places where cellular signal is shielded by metal or concrete walls: offices, supermarkets, cinemas, hotels;


3) Places distant from the BTS like private houses.




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We are manufacturer, and have our own factory.



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

A: Please feel free to contact us with your inquiry, we will find the frequency you need and address your problems.


Contact Details
Shenzhen Atnj Communication Technology Co., Ltd.

Contact Person: Angel Wang

Tel: 15989511440

Send your inquiry directly to us (0 / 3000)