This audiometer is staffed with a fresh design and allows air conduction with 11 frequencies from 125 Hz to 8 kHz. The frequencies can be set in accordance with users' needs. The intensities vary from -10 dBHL to 100 dBHL in 5 steps or 1 dB. The pulse tone is pure and warbles. It does not require battery backup and runs on environment friendly power supply. According to Hughson-Westlake, MA 25e offers automatic test.