Main features:

Heart rate measurement
Blood-oxygen measurement
Auto shutdown
Low battery indication
LCD display
Compact design
High coverage finger pad
Energy efficient
One-key control

Specifications:

Display type: LCD display
Screen size: 14 x 28 mm
SpO2 measurement range: 0-99%
SpO2 resolution: 1%
SpO2 accuracy: 70%-99%, ±2%, 0-69%, no definition
Pulse rate measuring range: 25-250BPM
Pulse rate resolution: 1 BPM
Pulse rate accuracy: ±1 BPM/±1% BPM (whichever is the larger value)
Input power: 2 x 1.5V AAA batteries
Housing material: ABS
Operating temperature: 5°C-40°C
Product dimension: 32 x 58 x 34 mm (W x D x H)
Package dimension: 86 x 70 x 40 mm (W x D x H)
Net weight: 26.5g (w/o batteries)