B01MSD0UC5 Smoothtalker Stealth X6 65dB 4G LTE Extreme Power Cell Phone Signal Booster for Home and Office

Highest power booster available – Boosts 4G LTE and 3G signals for all networks
Improves voice calls and increases data speed for all cellular devices
Covers up to 8000 sq. ft.(Sq ft will vary with outside signal strength)
Ideal for remote locations greater than 6 mi. (10 km) and up to 30 mi. (50 km) from the nearest cellular tower
Made in North America – 2 Year Warranty – please scroll down for more product info.