Affordability - Based on warranty, available options, maintenance cost, battery cost.

Capability - Based on range, clarity, durability, compatibility with radio communication equipment, hands-free use, alert tone option, volume control, multiple power source, easy to see.

Deployability - Based on ease to setup, easy to carry, mobility afer setup, storage case, storage requirements, ease of changing battery/ power source on scene.

Maintainability - Based on user maintainability, required battery type.

Usability - Based on capatible with PPE, operational simplicity, ergonomics, size, weight, alternate power source, battery/ power source indicator.