Features:

Dsl-330:
4 digit lcd display.
Max, min function.
Fast&slow dynamic characteristic models.
Level range from 30 ~ 130db.
Resolution 0.1db update cycle 0.5s.
Accuracy 1.5db.
A&c frequency weightings.
Ac/dc signal output.
Low battery indication.
Level range: Lo = 30 ~ 80db; med range = 50 ~ 100db; hi = 80 ~ 130db
Dsl-332:
4 digit lcd display.
Max hold function.
Fast&slow dynamic characteristic models.
Level range from 35 ~ 130db.
Resolution 0.1db, accuracy 1.5db.
A&c frequency weightings.
Ac/dc signal output.
Low battery indication.
Reset function.
Self-calibration 94db.
Certificate: Ce