PROUTONE Verizon 4G LTE Cell Phone Signal Booster for Home&Office - Improve Data and Voice Signal 700MHz Band 13 Repeater Antennas Kit IMPROVE DATA SIGNALImprove Verizon 4G LTE data signal on Band 13, faster your upload&download speeds. SUPPORT MULTIPLE USERSSupports multiple users and all cellular devices in home/office/basement up to 2500sqft. EASY TO INSTALLAll of the components needed for installation are included in the package, step-by-step instructions. Requires no technical experience. HOW IT WORK The outdoor antenna receive signal from the near cell tower, the booster amplify the signal, and the indoor antenna transmit the enhanced signal to your cellphones. WARM GUARANTEEFCC certified, 30 days Customers Satisfaction, 3 Months Free Replacement, 1 Year Manufacturer Warranty. Dial *3001#12345#*, then press Call button; Click &#039;Serving Cell Info&#039;; Check &#039;Freq Band Indicator&#039;. If it shows 13, please choose this booster. If the test result is other number, please choose another booster according to your band. Download and install the app: LTE discovery; Press &#039;SIGNALS&#039;, check &#039;EARFCN&#039;.If it shows Band 13, it is suitable for you.