The AS208 is a small and inexpensive manual air conduction audiometer ideal for hearing testing in schools, industry, and primary care facilities.
Includes carrying bag
AC power adapter
Battery powered 

Fully portable
The AS208 includes a carrying bag to store the audiometer and accessories with a total weight of only 4.5 lbs.
Battery or external power supply
Batteries and an AC power adapter are included. To ensure reliable test results a battery indicator lets you know when the batteries are running low.

11 frequencies
A full range of frequencies from 125Hz to 8kHz and intensities of -10 to 100 dB HL are provided and it complies with current ANSI standards.