Boost weak 2G/3G/4G signals instantly with GREETWIN"s tri-band amplifier, featuring high-gain antennas for 65dB±3dB amplification. Its durable aluminum alloy housing ensures heat dissipation while maintaining a compact 164x164x45mm footprint. Compatible with all major carriers, this FCC-certified repeater covers up to 300㎡ - ideal for rural homes, basement offices, or remote warehouses. The plug-and-play design requires no software, with automatic signal detection and LED strength indicators. Includes 30-day replacement and 2-year technical support. Ships factory-sealed with mounting hardware.