Signia Hearing Aid Battery Size 312, Pack of 30 Batteries

✅ ACCURATE AND RELIABLE – Our oximeter fingertip pulse accurately determines your SpO2 (blood oxygen saturation levels), pulse rate, pulse strength and perfusion index in 10 seconds and display it conveniently on a large digital LED backlit display.
✅ LIGHTWEIGHT & PORTABLE: Vandelay oxygen saturation monitor is very light and small size, low power consumption and convenient in carrying. Also it comes with a detachable lanyard which can measure your oxygen saturation anywhere.
✅ ACCOMODATES WIDE RANGE OF FINGER SIZES – The finger chamber is built with medical grade hypoallergenic silicon and a SMART Spring System. Works for ages 12 and above.