Icom HM-100TN, DTMF Microphone – DISCONTINUED. Replaced with HM-152T Quantity in Basket: None Code: HM100TN Price: $0.00 Shipping Weight: 3.00 pounds Quantity: Icom HM-100TN DTMF Microphone for IC-F121/s, IC-F221/s, IC-F320/S, IC-F420/S, IC-F520, IC-F521, IC-620, and IC-F621 Series Mobiles. DISCONTINUED