The RFMAX "Brick"" antenna # RBDM-44-SS-6 is a compact, ultra-rugged direct-mount antenna designed for M2M machine-to-machine applications like Digital Signage Lottery and ATM machines. The unit measures 7.9 x 3.5 inches, with a height of just 1.8 inches. This antenna was designed to exceed all 3G/4G/LTE specifications from the major North American cellular carriers including AT&T, Verizon, Sprint & T-Mobile.