Technical Specifications:

Display : Screen Size: 84 mm x 31 mm

Resolution : 192 x 64 pixel

Power supply and battery : Internal Battery: 3.7V, 2.2 AmpHrs. Li-ion rechargeable / work time : 4h

AC Mains : 100 VAC to 240 VAC, 50 Hz to 60Hz,1 A max

SPO2 SPECIFICATIONS :

Range ：0 - 100%

Resolution ：1%

Accuracy ：when 70 - 100%: 2 digits; when 0%-69%: no claimed accuracy.

Pulse Rate SPECIFICATIONS :

Range ：30 - 250bpm

Resolution ：1bpm

Accuracy ： 2% or 2bpm