Hillrom Welch Allyn Oae Hearing Screener. Fast, accurate results--about 10 seconds per ear. Objective testing--no patient response required. Clear results that don't require caregiver interpretation--Pass/Refer result provided by instrument. Portable, reliable design gives you increased confidence and flexibility. 10-test memory storage in device. Simple printer interface for easy patient data documentation.Patient information can be downloaded into a PC ASCII file. Optional power supply: rechargeable lithium battery or AC power. 1-year warranty, extended warranty available.