What does K and Ka mean on a radar detector?

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Tags

1. #detected
2. #alerts
3. #those
4. #different
5. #valentine
6. #urgent
7. #range
8. #bands
9. #radar
10. #sound
11. #these
12. #bogeys
13. #frequencies
14. #threats
15. #closer
16. #likely
17. #usually
18. #makes