Feature: 1. LCD display function to display signal reception. 2. Suitable for blind spot signal amplification in various indoor places such as conference halls, hotels, and large buildings. 3. Expand the coverage area of the base station signal. 4. Improve the coverage of sending and receiving mobile phone signals. 5. Reduce the radiation of the mobile phone to the human body. 6. Extend the time and life of the mobile phone battery. 7. Easy to install, environmentally friendly, small size, flexible configuration according to specific application occasions. 8. Full-duplex work, high isolation between uplink and downlink, will not interfere with each other. 9. With high digital filtering technology, out-of-band rejection is particularly fine. 10. The outdoor overflow signal is small and does not interfere with the base station receiving sensitivity. 11. The call process is smooth, not stuck, not interrupted, improving work efficiency. 12. Applicable to all areas with poor indoor signal and no signal, such as high-rise buildings, elevators, office buildings, basements, KTV, yachts, urban villages, tunnels, remote mountainous areas, etc. Specification: Made of fine quality material, practical, easy to install and use, wide application range, has a long service life. Features: LCD display function to display signal reception. Suitable for blind spot signal amplification in various indoor places such as conference halls, hotels, and large buildings. Expand the coverage area of the base station signal. Improve the coverage of sending and receiving mobile phone signals. Reduce the radiation of the mobile phone to the human body. Extend the time and life of the mobile phone battery. Easy to install, environmentally friendly, small size, flexible configuration according to specific application occasions. Full-duplex work, high isolation between uplink and downlink, will not interfere with each other. With high digital filtering technology, out-of-band rejection is particularly fine. The outdoor overflow signal is small and does not interfere with the base station receiving sensitivity. The call process is smooth, not stuck, not interrupted, improving work efficiency. Applicable to all areas with poor indoor signal and no signal, such as high-rise buildings, elevators, office buildings, basements, KTV, yachts, urban villages, tunnels, remote mountainous areas, etc. Specifications: Material: metal Color: silver+grey Frequency range: Uplink: 890~915MHz Downlink: 930~960MHz Power: -70~-40dBm/FA (1.23MHz) Booster gain (dB): Gp≥58Gp≥55 Outdoor directional antenna gain (dB): 8 Indoor antenna gain (dB): 3 Major exporter (PO): ≥10dBm Passband ripple: ≤3dB I / O impedance: 50Ω / N connector Noise factor: ≤4dB Propagation delay: ≤0.5μs Ambient temperature: -10℃~60℃ Package size: 480 * 200 * 155mm / 18.9 * 7.9 * 6.1in Package weight: 1350g / 3.0lb Package list: 1 * GSM 900MHz Cell Phone Repeater 1 * Outdoor Yagi Antenna with 10 Meters Cable 1 * Indoor Antenna 1 * Power Adapter 1 * Set Mounting Accessories 1 * User Manual Package List: 1 * GSM 900MHz Cell Phone Repeater 1 * Outdoor Yagi Antenna with 10 Meters Cable 1 * Indoor Antenna 1 * Power Adapter 1 * Set Mounting Accessories 1 * User Manual