This cell phone signal repeater booster is high gain 55dB for car??truck??RV??boat</br>This cell phone signal repeater booster will only work with Band 12 ATT 700MHz 4G Lte ( Frequency range:728-746MHz/698-716MHz )</br>This cell phone signal repeater booster will reduce dropped calls and improves the voice quality in car</br>This cell phone signal repeater booster could be used for car??truck??RV??boat</br>A 30-day money-back guarantee and is backed by