Maico's smallest portable audiometer is designed to broaden your screening options. Although the MA 25 is small, it offers a full range of testing opportunities. Frequency levels range from 250 Hz to 8000 Hz, and signal intensities run from 10 dB HL to 90 dB HL. Gain new testing advantages with the versatility of battery operation (9 volt - 150 hours of operation or optional AC can be purchased separately). Complete with attractive leather-look case.