Our enterprise since its inception, constantly regards product good quality as organization life, constantly improve production technology, strengthen merchandise high quality and continuously strengthen enterprise total good quality administration, in strict accordance with all the national standard ISO 9001:2000 for KW20L 1800MHz Mobile Signal Booster 2G 3G 4G Cell Phone Signal Repeater, With outstanding services and good quality, and an business of foreign trade showcasing validity and competitiveness, which will be reliable and welcomed by its purchasers and makes happiness to its workers.
Our enterprise since its inception, constantly regards product good quality as organization life, constantly improve production technology, strengthen merchandise high quality and continuously strengthen enterprise total good quality administration, in strict accordance with all the national standard ISO 9001:2000 for Cell Phone Signal Repeater, Mobile Signal Booster, We critically promise that we offer all the customers with the best quality items, the most competitive prices and the most prompt delivery. We hope to win a resplendent future for customers and ourselves.

Then here i can introduce the working principle of KW20L quad band GSM signal repeater:
1.At outside, confirm a place where with better signal at 4 signal frequencies.
2.Install outdoor antenna at the better signal site. And outdoor antenna better point to the base station.
If you don’t know how to check with it, you can contact with us. We can help you deal with it.
3.Install booster inside home and use 15m cable to connect with them. But the most important thing is about isolation. Isolation between outdoor and indoor antenna should be had a brick wall to separate. If not, try to enlarge their distance.
4.Finally, use cable to connect with KW20L quad band GSM signal repeater and indoor antenna.
Then turn on the booster.
Pay attention: if you want to check the booster ok or not? You can directly turn on booster to test.

signal amplifier are suitable in many different places where the mobile signal receipt is poor like tunnel, rural are, shopping mall, parking lot, KTV room, etc.

And for different size of the application, the network solutions are different, for example, like KW20L quad band GSM signal repeater.
1.If coverage is 100-200sqm, you can consider for full kit with 1 indoor panel antenna.
(Full kit includes: outdoor LDPA antenna, outdoor 15m cable, booster, indoor panel antenna with 2m cable, adapter.)
2.If coverage is more than 200sqm or with 2 floor building, then you can consider for two to three indoor antennas.
(Full kit includes: outdoor LDPA antenna, outdoor 15m cable, booster, 1m cable, 2-way adapter, 2 indoor panel antennas, indoor cable 5m or 10m, adapter.)
If you are confused about the installation plan, you can contact with us for more professional suggestions.

1. What is the isolation said above?
Isolation means between indoor and outdoor antenna there can be a brick wall or long distance.

2. How to test outdoor signal strength?
You can download a cell application named “Cellular Z” and show us screenshot content. We will check for you.

3. What about  signal booster warranty?
All of signal booster or others supporting products’ warranty is about 12-24 months.

4. W the signal booster it does not work well after following the installation guide?
It is better to check if there is signal interference. You can contact with us for solution.

Our enterprise since its inception, constantly regards product good quality as organization life, constantly improve production technology, strengthen merchandise high quality and continuously strengthen enterprise total good quality administration, in strict accordance with all the national standard ISO 9001:2000 for KW20L 1800MHz Mobile Signal Booster 2G 3G 4G Cell Phone Signal Repeater, With outstanding services and good quality, and an business of foreign trade showcasing validity and competitiveness, which will be reliable and welcomed by its purchasers and makes happiness to its workers.
KW20L 1800MHz Mobile Signal Booster 2G 3G 4G Cell Phone Signal Repeater, We critically promise that we offer all the customers with the best quality items, the most competitive prices and the most prompt delivery. We hope to win a resplendent future for customers and ourselves.