3.5v Pneumatic Otoscope Head Defibrillation A 2 hour charge will produce Two 1 inch urethane A 2 hour charge will produce up to 20 hours of listening time❗ This long lasting charge makes the BlackPearl™ unique and one of the best rechargeable hearing aids on the market * VIPER weighs 32 lbs Welch Allyn© 3 5v Pneumatic Otoscope with Specula (Head Only) is Ultra sealed for pneumatic otoscopy * An instrument that provides 30% brighter whiter light output and a rotating lens with ultra seal for pneumatic otoscopy * Halogen HPX lamp for 30% more light output for true tissue color and consistent long lasting illumination * Rotating lens with ultra seal allows for pneumatic otoscopy * Fiber optic illumination produces cool light *