The HM-162 Command Mic III from ICOM allows you to have the convenience of a second station for your IC-M504 radio. All functions including channel operation, DSC, foghorn, and distress calling are at your fingertips with the Command Mic III. The HM162 is small, yet boasts a large full dot-matrix display screen making the data easy to see. The Command Mic III is rugged as well. Rated at IP-X8 submersible, it can stay submerged in 1.5m depth for up to 30 minutes. 2-1/2"W x 5-7/8"H x 1-1/2"D. Three-year warranty.