The Wilson Signal 3G™ cellular signal booster is a simple, effective solution to maintain continuous communication for all cellular-enabled devices - in M2M situations. M2M (machine to machine) product. Boosts 3G signals with the same award-winning technology from weBoost consumer signal boosters. Perfect for fleet management, security equipment, vending machines, and other electronics. This kit comes with a 4" mini-mag antenna and a hardwire power supply. If you want the 12" magnet mount antenna, please check out the Wilson Signal 3G M2M 460109.