what is a signal booster

Cellular Signal Amplifier 900/2100mhz Repeater LTE Signal Booster Powerful 2G 3G 4G 5G mobile signal booster

GSM 850Mhz Cell Phone Signal Boosters / Marine Signal Booster High Power

2.4G and 5.8 G RF Shield WLAN Signal Booster Extender Amplifier

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23dBm Power Triple Band Signal Booster 70dB Gain 1000 Coverage Including Accessories

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Upgrade Your TV Signal Strength with Android TV Box DVB-T2 Antenna Signal Booster

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