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5watts GSM900mhz signal booster ST-900&5W Max coverage 5000sqm What is the booster? Cell phone signal booster (also named repeater, amplifier) is a product designed to solve the mobile phone blind signal. As the mobile phone signal is transmitted by electromagnetic waves to establish a communications link, however there are a lot barriers make it is unavailable to get sound signal. When people enter some tall buildings, some places basement malls, restaurants and parking lot, some places of entertainment such as karaoke sauna and massage, some public place such as subway, tun
5watts Indoor GSM Signal Repeater Waterproof
