Step 1: Understand the properties of fuse wire.
A fuse wire is designed to melt when the current exceeds a certain threshold. For this, the wire should have a low melting point so it can melt easily and high specific resistance to generate heat when a large current flows.
Step 2: Conclusion.
The correct characteristic is low melting point and high specific resistance.
Final Answer:
\[
\boxed{\text{Low melting point, high specific resistance.}}
\]