Product Features: 1. Large-scale coverage of 100-200 square meters (-75dBm, indoor transparent environment, depending on the distance of surrounding base stations) 2.30W (single-channel 3-5W) effectively shields the triple play 2G 3G 4G 5G mobile phone signal and WIFI signal 3. Equipped with precision voltage stabilizing circuit, it can be used normally even in the case of large voltage fluctuations 4. Original chips and circuit boards ensure high efficiency, stable performance and long life 5. Durable ABS shell: waterproof, wear-resistant, heat-resistant 6. Convection vents and built-in high-efficiency heat sinks and fans to prevent local heat accumulation and efficient heat removal 7. Simple appearance, small size, and less space 8. Green environmental protection, no harm to human body 9. Easy and convenient installation