Use To Amplify The Cell Phone Signal Car/ Truck; Works With Cellular Service Provider AT And T/ T-Mobile/ Verizon/ Sprint/ Straight Talk; Voice/ Text/ 4G Data; 50 decibels (dB) Maximum Gain; 700 MHz At Band 12 And 17/ 700 MHz At Band 13/ 850 MHz At Band 5/ 1700/2100 MHz At Band 4 And 1900 MHz At Band; 6 Volt/ 2.5 Amp; 6-1/4 Inch Length x 4-1/2 Inch Width x 1 Inch Height; With 4G Signal Amplifier/ 4 Inch Height Magnet Mount Antenna/ 3.2 Inch Length x 1.4 Width x 1/2 Inch Height Slim Low-Profile Antenna/ Power Supplytable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; } Ltl Freight Required: f