Tri-Band II LTE Signal Booster Kit – Supports LTE B20, DCS & LTE B7 for Enhanced Indoor Coverage

1. Tri-Band Support – Boosts LTE B20 (800MHz), DCS (1800MHz), and LTE B7 (2600MHz) for reliable voice, 4G LTE, and data coverage.
2. High Gain & Low Ripple – Delivers up to 65 dB gain with ≤6 dB in-band ripple for stable, clear signal amplification.
3. Complete Kit Included – Features a directional outdoor antenna (12 dBi), omnidirectional indoor antenna (5 dBi), 4-way splitter, cables, connectors, and wall-mount amplifier.
4. Easy Installation – Designed for wall mounting with IP40 rating, operating in temperatures from -10°C to 55°C and up to 90% humidity.
5. Energy Efficient & Reliable – Consumes <3.6W, MTBF >50,000 hours, and works with 100-240V AC or 5V DC power supply.

Product Description:

Overview
The GB21 Tri-Band II is a professional-grade LTE signal booster kit engineered to enhance mobile connectivity in homes, offices, and small to medium-sized indoor spaces. By amplifying weak outdoor signals across three key frequency bands—LTE B20, DCS, and LTE B7—this system ensures stronger, more reliable voice calls, faster 4G LTE data, and seamless streaming indoors.

Technical Specifications

• Network Compatibility: LTE B20, DCS (GSM1800), LTE B7
• Frequency Range:
  • LTE B20: Uplink 832–862 MHz, Downlink 791–821 MHz
  • DCS: Uplink 1710–1785 MHz, Downlink 1805–1880 MHz
  • LTE B7: Uplink 2500–2570 MHz, Downlink 2620–2690 MHz
• Gain: 55 ±3 dB (B20), 65 ±3 dB (DCS & B7)
• Bandwidth: 30 MHz + 75 MHz + 70 MHz
• In-Band Ripple: ≤6 dB per band
• Output Power: 20 dBm
• Impedance: 50 ohm
• RF Connector: N-Female

Kit Contents

1. Amplifier Unit

   • Max Gain: 70 dB
   • Output Power: 20 dBm
   • Power Consumption: <3.6W
   • Power Supply: AC 100–240V, 50/60 Hz; DC 5V/2A
   • Dimensions: 209 × 130 × 17 mm
   • Installation: Wall mount

2. Outdoor Directional Antenna

   • Gain: 12 dBi
   • Frequency: 700–2700 MHz
   • Beamwidth: 120°

3. Indoor Omnidirectional Antenna

   • Gain: 5 dBi
   • Frequency: 800–2700 MHz
   • Radiation: Full 360° coverage

4. Accessories

   • 4-Way Splitter: Frequency 800–2500 MHz, Attenuation 6.5 dB
   • RG-5 Cable: 50Ω, Attenuation 30 dB/100m
   • 5D Connectors: Alloy, 50Ω, Attenuation 0.1 dB

Reliability & Environment

• MTBF: >50,000 hours
• Operating Temperature: -10°C to 55°C
• Humidity: Up to 90%
• Ingress Protection: IP40
• Net Weight: <0.6 kg

Easy Setup
The GB21 kit includes all components needed for a straightforward installation. The outdoor antenna captures existing weak signals, which are amplified by the indoor unit and broadcast via the indoor antenna. The system is plug-and-play, with clear connectors and wall-mount design for hassle-free deployment.

Ideal For

• Homes and apartments with poor signal reception
• Offices, conference rooms, and coworking spaces
• Basements, warehouses, and rural buildings
• Users on networks operating LTE B20, DCS, or LTE B7

Note: This booster is designed to amplify existing cellular signals. It does not generate signals and requires a minimal outdoor signal to operate effectively. Always ensure proper antenna separation during installation to prevent oscillation.

Upgrade your indoor mobile experience with the GB21 Tri-Band II—engineered for performance, reliability, and everyday connectivity.