2G 3G 4G LED Display Cell Phone Signal Boosters Professional Mobile Phone Signals Repeater Amlifier with Antenna Improve Indoor mobile signal,no more dropping calls,no more bad network speed. Features: Aluminum alloy material is practical and has perfect heat dissipation performance. Support three major carriers, applicable to most brands of mobile phones, real-time display signal strength. The gain of amplifiers varies from 65-107dB and can be controlled according to the strength of the external signal. Easy to install. This repeater set includes everything you need. LED signal light indicates the signal status. Specifications: Frequency: 900MHz/1800MHz, 900MHz/1800MHz/2100MHz (optional) Main color: black Material: aluminum alloy Screen size: 90 * 30mm Impedance: 50ohm Item size: 214 * 160 * 56mm / 8.4 * 6.3 * 2.2in Package size: 300 * 200 * 80mm / 11.8 * 7.9 * 3.1in Package weight: 2200g / 4.9lb Packing List: 1 * Booster 1 * Power Cable 1 * 15.0m Cable 2 * Antenna 1 * User Manual