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Item specifics
  • Brand Name: VOTK
  • Model Number: CDMA990
  • Place of Origin: Guangdong, China (Mainland)
Product Description


Selling point:

1. CDM980A booster for USA BRAZIL ( in other country which use CDMA 850 mhz );
2. 850mhz booster ; 

3.LCD display

4..70db high gain

5. ALC technology


Operating frequency range:  850MHz CDMA 
                                      824MHz~849MHz uplink   ;     869MHz~894MHz ( downlink );
Gain: 65dB ( uplink ) ; 70DB( downlink )
Flatness: 3dB
Noise figure:  3dB
In wave ratio:1.4 (V.S.W.R)
Device delay: 1s
Spurious Radiation: -39dBm

Power: 23dbm


packing included

1pcs CDMA990 booster

EU or USA adaptor

blue CDMA990 koway


remind this booster can\'t work without antenna, you need buy outdoor and indoor antenna,cable again


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 50-70DBM. 

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

   3.If the strength is not steady, please check if outdoor and indoor    antenna are too close, pls ensure the outdoor antenna have distance of 10 meters at least, with a between and not in a same horizontal line.    

4.keep antenna and booster far from windows.

5.pls put indoor antenna in place which is above 2 meter high and far from wall to installation.

6.Packed the connector by waterproof glue, otherwise wet reduce the signal cover area.


Note :

Please check your outdoor signal condition before placing the bid.

- This kit is only suitable for the work condition while the outdoor signal is full and indoor signal is below 3 grid.


- If  outdoor signal is 4 grid or below 4 grid,hi-gain antenna likes yagi antenna or panel antenna might be required for amplifier\'s working.


if sometimes the signal is full,sometimes no signal again in your mobile, or you couldn\'t call out when the signal is full, it couldn\'t be used any booster in your environment.

Cell phone signal amplifier is impossible to ensure all environments are 100% 

effective, because the SIGNAL is very complex, especially in the city, no one 

can guarantee 100% available ,in some areas the signal is not necessarily the CDNA850, some of the signal is reflected signals, even the signal display very well,but the quality is poor, and have encountered a lot of environment can not be solved with any booster.

The product will not work good if your outdoor signal is not good or bad .
We will not bear any responsibility of your outdoor SIGNAL is not good .


If your room is empty and no obstacle , no walls, max. it can enlarge to use for 200 square meters max. . but normal recommend for 50-100 square meters normally in open space .

how to installation 01 yagi KOWAY

how to installation 02 yellow KOWAY

how to installation 03smLCD KOWAY

how to installation 04smLCD



We only accept escrow by via WEB money(WM), TT,Western Union, QiWi wallet, Boleto and credit card here, it is safe for you and us together


We depend on our customer satisfaction to succeed. Your feedback is extremely important to us.
If you are satisfied with our items. please leave us positive feedback, we will offer you discount or gift for next order.
Contact us before leaving any negative of neutral feedback.
We will work with you to slove any problem.

Usually we stop to service of customer who give us negative feedback.

Import tax

We are not responsible for any custom duty or import tax.

the buyer responsible for import tax, if you wouldn’t like to pay import tax by yourself, please stop to give us order. Aliexpress also ask the buyer responsible for import tax, even you give us disputer for it and we couldn’t pay it for you.


1. Item will be sent to the order address, please confirm with us address before give us order, please offer us full address and correct address with telephone No before give us order.

2.if you want to change address, please change it in aliexpress before give us order, we only send goods to the address same as order.

3.Regarding delivery time, we couldn’t guarantee for you, because we are not shipping company and couldn’t control shipment indeed, only check with shipping company in time.. if you need goods urgently, we suggest you choose DHL FEDEX UPS etc instead of china post mail HK post mail etc

4.we will do our best to arrange shipment once get your order, usually it need 3-5 days to delivery goods except some factory is very far or some goods is out of stock.

5.all goods will be written “GIFT" in custom declaration

6. please check the parcel carefully before signature, if you find it broken or shorts of parts, please refuse to take goods or ask shipping company give you proof or refund.

Warranty &Maintenance:                           

We provide 1 month replacement and 12 months maintenance warranties. Items can be replaced during the first month or maintained for the first year.Merchandise which is damaged or missing components is not refundable.
Buyers are only responsible for the return shipping fees for warranty items.(In most cases, buyer will only have to return the problem components rather than the entire package.).
Before returning items, please make sure you get our (the seller’s) return address, and write “gift” on the delivery detail sheet. Please use regular postal service and send us the tracking number. As soon as we receive the items, we will repair or exchange them ASAP.
We are not responsible for any damage or other problem produced by user after use and only repair the product with quality problem.




Packaging Details
  • Unit Type: piece
  • Package Weight: 1.0kg (2.20lb.)
  • Package Size: 30cm x 30cm x 10cm (11.81in x 11.81in x 3.94in)
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Packaging Details
  • Unit Type: piece
  • Package Weight: 1.0kg (2.20lb.)
  • Package Size: 30cm x 30cm x 10cm (11.81in x 11.81in x 3.94in)
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