Mobile Signal Booster Kits · Model SL-900-23DB

SIGLIFT SL-900-23DB Mobile Signal Booster

900 / 1800 / 2100 MHz Band 8 / Band 3 / Band 1 Works with Airtel, Vi, BSNL Up to 5,000 sq.ft

Who is the SL-900-23DB for? Offices, showrooms, clinics and multi-room homes of up to 5,000 sq.ft where Airtel, Vi or BSNL calls drop or 4G slows indoors. It amplifies 900 / 1800 / 2100 MHz (Band 8 / Band 3 / Band 1).

Covers upto 5000 Sq. Feet Area
Supports: 900 / 1800 / 2100 MHz Frequency
[Band 8 / Band 3 / Band 1]
Easy to Install, Plug and Play
24x7 Technical Support
Support Multiple Users and Devices
CE, RoHS and CCC Certified

WhatsApp Call Expert

Not sure this model fits your network? Use the Booster Finder or compare booster models.

1-Year Warranty
Free shipping in India
Cash on delivery
10-Day Returns

Download specification sheetSL-900-23DB · frequencies, gain, power & more · A4 PDF

Overview

The SIGLIFT SL-900-23DB Mobile Signal Booster is a 900 / 1800 / 2100 MHz mobile signal booster (Band 8 / Band 3 / Band 1) from SIGLIFT. It captures the existing signal outside your building with an outdoor antenna, amplifies it and rebroadcasts it indoors, fixing call drops, cracking voice and slow 4G data across up to 5,000 sq.ft. It suits Airtel, Vi, BSNL. Because operators use different bands in different telecom circles, our experts confirm compatibility for your SIM and location before dispatch.

Works on every major network: jio, airtel, vi and bsnl

SL-900-23DB specifications

Download PDF

Parameter	Specification
Model No.	SL-900MB
Frequency Uplink (MHz)	890-915 / 1710-1785 / 1920-1980
Frequency Downlink (MHz)	935-960 / 1805-1880 / 2110-2170
Gain	Uplink 60 ±3dBi, Downlink 75 ±3dBi
Export Power	21dBm ±3dBm
Power Supply	Input AC 110V-240V 50/60Hz, Output 12V 2A
Pass Band Ripple	≤3dBi
I/O Impedance	50Ω
Connector Type	SMA Female Connector
Noise Figure	≤4dBi
Transmission Delay	≤0.5µs
Ambient Temperature	-10°C ~ 60°C
Reliability	To The GB6993-86 Standard
Electromagnetic Compatibility	To The ETS300 694-4 Standard
Warranty	1 Year

SL-900-23DB — frequently asked questions

What is a mobile signal booster and how does it work?

A mobile signal booster (also called a mobile network booster or repeater) has three parts: an outdoor antenna that captures the existing signal from the nearest tower, an amplifier that strengthens it, and an indoor antenna that rebroadcasts the stronger signal inside. It improves calls and 2G/3G/4G data wherever at least some usable signal is available outside the building.

Will a Siglift booster work with Jio, Airtel, Vi and BSNL?

Yes. Siglift boosters are matched to the frequency bands used by Indian operators, so they work with Jio, Airtel, Vi and BSNL. Because each operator uses different bands in different circles, our team confirms the right model for your SIM and location before you buy — just share a screenshot of your phone's network info on WhatsApp.

How much area can one booster cover?

Coverage depends on the model and on the outdoor signal strength. Siglift home models cover roughly 1,500–3,000 sq.ft, while high-gain models cover 5,000 sq.ft and the SL-850-27DB up to 10,000 sq.ft. Larger or multi-floor buildings add extra indoor antennas with splitters. Tell us your floor area and we will recommend the right kit.

Do you provide installation in your home or office?

Every kit is designed for easy do-it-yourself installation, and our technical team guides you by phone or WhatsApp. Professional installation is available in many cities — call or WhatsApp us to check availability for your location.

Will it work if there is no signal at all outside?

A booster amplifies existing signal; it cannot create signal from nothing. If you get at least one or two bars on the roof or terrace, a booster can bring strong indoor coverage. Our experts can check your location’s signal before you order.

What warranty and support do I get?

Siglift boosters come with a 1-year warranty, free shipping across India, cash on delivery, a 10-day return policy and 24x7 technical support.