Heavy duty jobs call for heavy duty radios, and the Icom IC-F3031/F4031 is a business two way radio that is made to take the extreme. The F3031S / F4031S is a rugged handheld radio designed for tough, demanding work environments. It is IP67 dust and water proof and meets MIL:-STD-810-C,D,E, and F standards for durability. It's also submersible in up to 1 meter of water for 30 minutes! PC Programmable with 128 channels and 8 zones, the IC-F3031S / IC-F4031S provides powerfully flexible radio communications when and where you need them.