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Signal Boost DCS 1800 MHz Mobile Booster / Repeater Kit


SI 20WB18D DCS Mobile Booster / Repeater Kit


The Senao Internationals SI 20WB18D is designed to amplify cell phone signals on the GSM 1800MHz frequency Wide band in your home or office. The kit is designed for easy installation and includes everything you need to improve your cell phone reception.


  • Wireless - no physical connection to phones.
  • Compatible with all cellular service providers.
  • Increases call clearity.
  • Systems can be self installed professionaly.
  • Complete kit includes everything you need to improve reception in your home or office.
  • Up to 2,000 square feet coverage area depending on the signal availability.
  • Compatible with both cell phones and broadband data cards.
  • Designed for easy installation and simple to use.
  • Operates with multiphones simultanously.
  • Extends cell phone battery life.
  • Great value kit.
  • Solid aluminum casing blocks all stray radiation.
  • 30-day money-back guarantee.
  • 1 year warranty.
  • Frequency: 1710-1880MHz (GSM Wide Band)
  • 76/72dB total gain:
  • -60dB dynamic gain bi-directional amplifier
  • -9db directional antenna (external)
  • -7/3db internal rebroadcast antenna.
  • 20dBm output power
  • Auto-oscillation detection and shutdown
  • Senao International are a well established repeater company, providing high quality units at great prices. The SI 20WB18D mobile booster / repeater kit is a high powered kit which operates on the 900MHz frequency, a frequency used by most cellular networks in India.

  • The SI 20WB18D is a full mobile booster / repeater kit, including everything you need to improve your mobile phone signal over an area up to 2,000 sq feet. Included in this full kit is:

    This antenna is mounted outside and receives the mobile phone signal. The antenna is directional, and so is designed to point toward the nearest mobile phone tower to receive the maximum signal possible.

    The repeater is a high powered unit, featuring 60dB of gain on the uplink and 65dB gain on the downlink. It works on the 1800MHz frequency, which covers most cellular providers in the world.

    The indoor antenna rebroadcasts the boosted signal. Unlike the outdoor antenna, this one is omni/ Patch directional, and so broadcasts signal equally in all directions. It is therefore designed to be placed in the center of where you wish to receive signal improvement.

    A 10m cable connects the outdoor antenna to the amplifier, and a 5m cable connects the amplifier to the indoor antenna.

    The SI 20WB18D comes with a full instruction booklet detailing how to set-up your repeater kit. The process is very simple, as you can see from the guide.
  • If you have any questions about the SI 20WB18D booster / repeater kit, then please contact us 24 hours a day.
  • The cable length can be customized according to customer needs with additional charges. All of our cables are custom terminated and tested by our technicians here at our facility at the time your order is placed. Please note longer cable is not better. Order only the cable length you need to avoid unnecessary signal loss.

  • Following cables are recommended:

  • upto 30 m >LMR 400>
  • upto 50 m > "

  • You can order more indoor antennas to facilitate multi-room / floor users, Lightning Surge Protector for outside antenna with additional charges.

  • Coverage Area (please read) Coverage area is based upon a minimum outside signal strength of 65% or better. Inside coverage distance varies depending upon outside signal strength, carrier frequency and interior obstacles. As outside signal strength decreases, coverage area decreases. The SI 20WB18D system has been designed to provide approximately 2000 sf of coverage in poor signal areas and up to 2500 sf in strong signal areas. Sometimes multiple antennas are needed for optimum coverage. Please consult with Senao International to determine expected coverage area for your situation. If there is no signal outside, this unit will not give you any improvement in coverage.

  • Choice of exterior dual band cellular antennas :

  • . 9db omni-directional panel antenna or
  • . 12db direction yagi antenna

  • Choice of interior dual band cellular antennas :

  • . ceiling dome antenna or
  • . wall panel antenna

  • we'll also help you pick out the right kit for your application, just pick up the phone and call us.






Installation manual (pdf)

Technical Specifications (pdf)


Antenna Cable Extensions

800MHz Yagi Antenna Upgrade

Indoor Dome Antenna Upgrade

Lightning Surge Protector

Splitters & Couplers

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