AMBCO 650AB Audiometer CA-WA The teeth are spaced apart

The teeth are spaced apart at exactly the distance necessary to grab lice and nits but still smoothly run through strands of hair shaft near the scalp

readers learn about sign language

The Li-ion battery provides 30 hours continuous use when charged for 24 hours

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AMBCO 650AB Audiometer CA-WA The teeth are spaced apartThis audiometer is simple, lightweight and durable. The 650AB can be powered by either a standard 9V battery (included) or can be plugged into a wall with an AC adapter (included). Large dials control frequency and decibel levels and toggle switches control power, left right and pulse steady tones. The tone button is membrane covered to provide silent operation. Lights indicate tone, patient response and the 650AB has a low battery indicator. 5 year