Welch Allyn Green Series 777 Integrated Wall System with PanOptic Basic LED Ophthalmoscope, MacroView Basic LED Otoscope, BP Aneroid, Ear Specula Dispenser, and SureTemp Plus ThermometerThe Welch Allyn 777 PM2WAS US is a medical device used in healthcare settings for performing various diagnostic procedures. It is a wall mounted system that includes an ophthalmoscope, otoscope, blood pressure monitor, ear specula dispenser, and thermometer. The ophthalmoscope and otoscope are both equipped with LED lights for better visualization. The blood pressure monitor is an aneroid model, meaning it does not require batteries or electricity.