How does a signal booster work ?

How does a signal booster work ?

Most popular network booster in Bangladesh
It's a full complete package for your personal use, home, residential, office buildings, hotels, resort, farm, hospital, government office, remote are etc coverage up to 3800 sq ft,

[1] High gain ,easy installation and operation.

[2] Improve DCS GSM and 4G LTE 1800

[3] Support more than 25 cell phones to use at the same time

[4] Support operators DCS 4G LTE 1800 frequency

[5] Easy to install.

[6] LED signal light indicates the signal status.

[7 It’s a real bar gain

[8] Build-in power supply

[9] Full-duplex,signal-port design

Specification:

Model No.4G LTE Item DCS1800 Mini Repeater

Frequency Range Uplink:1710-1785MHZ Downlink: 1805-1880MHZ

Max Output PowerUp link :17±2dBm

Total powerDownlink: 17±2dBm Total power

GainUp link: Gp>=65dBDownlink: Gp>=70dB

Connector TypeN Female

Impedance50 ohms

Power-70 ~ -40dBm/FA (1.23MHz)
Impedance50Ω

Power SupplyAC 110/220V (used AC/DC Adapter 5V dc)
Seclusion>70dB

LCDYES

Compact DesignIndoor Use

Ambient temperature-10°C~60°C

Package Weight0.6KG

DemensionsAbout 160 x 110 x 23mm

A158 ：LPDA Outdoor Antenna

Directional800-2700MHz

Gain 9/10dBi

Ceiling Indoor Antenna

Omni Directional 800-2700MHz

Gain 3-5dBi 

50-5 10M Cable

N Male to N Male Connector

Package Include :

1 x 1800 4G MHz signal booster.

1 x LPDA Outdoor Antenna

1 x Ceiling Indoor Antenna

1 x Power adapter

1 x Manual