Our top-performing antenna, the IronMan, ensures superior signal quality. It's sturdy, reliable, magnetic, and ideal for Simtek StealthALERT. Includes a convenient 3m cable for easy installation. Ideal for heavy-duty safes, off-grid solutions, construction sites, and any scenario requiring top-tier reliability. Heavy-duty antenna Made out of copper for superior signal stability & performance 3M long cable (~10 feet length) Cable diameter 5mm 2.5" diameter magnetic base, super strong Gain : 6dBi Frequency : 698 - 960; 1710 - 2700Mhz Cable Length : 3 meters (9.8ft) Note: If you plan to string the antenna outside of your safe, you will likely need to add the braided metal extension cable . The ironman antenna cable thickness is 5mm, making it too large for most safe holes, however it will fit perfectly when daisy-chained with the braided metal extension cable. If you keep the ironman antenna inside the safe walls, you don't need to worry about the cable thickness.