Base station antenna 118.8-126.8MHz includes 50ft cable for Avionic mobile units. Use with ICOM A110B, A210B, A120B, or A220B. To be mounted externally on building. This antenna is specifically modified / trimmed to the 118.8MHz – 126.8MHz range for Icom avionics radios. Please ignore the generic instructions included in the box from Larsen.