5 Bands Cell Phone Signal Booster for Home Office Use - Multiple Band Cellular Repeater Kit Boosts All Carriers Verizon AT&T T-Mobile 3G 4G LTE Voice and Data Up to 4,500Sq Ft. Support Multi Devices.

Panel antenna should be mounted on the wall parallel to the range of peoples activities. Its best suited for long rectangular spaces.Yagi antenna should be pointed to the closest signal tower to get more signals. Its best suited for the weak or moderate external signal strength.Covers up to 4500 square feet ( performs best in open spaces ).Compatible with all US carriers, supports multiple simultaneous connections to accommodate family members and guests.Once anyone enters coverage, the signal of his mobile devices will be automatically enhanced without the need for a manual connection. Frequency Range: Band 2, 4, 5, 12/17, 13 Max. Gain: 70dB Max. Output Power: 20dBm MGC (Step Attenuation): ≧20dB / 1dB step Automatic Gain Control: ≧20dB I/O Port: N-female Impedance: 50 ohm Power Supply: Input AC100~240V 50/60Hz, Output DC 5V 2A The booster can only amplify signal, it cant create signal. If there is no outside signal, the booster will not work for you. Please make sure you can make calls successfully outside your house.The booster can only work with the cell phones which have the same frequency band as the booster. Please check which band your cell phone is using firstly by the methods below:For iPhone:For Android phone: