Feature: 1. Accurate determination of your pulse rate and blood oxygen saturation. 2. Ergonomically designed to better fit fingers without damaging fingers. 3. Lithium batteries can be used for a long time without frequent battery changes. 4. Light weight, compact size and rechargeable battery is easy to use anywhere. 5. Widely used in daily life, such as hospital, home health care, etc. Specification: Condition: 100% Brand New Item Type: Fingertip Pulse Oximeter Battery: 160mAh Lithium Battery Size: Approx. 4.3x2.6x2.2cm/1.7x1x0.9in. Package List: 1 x Fingertip Pulse Oximeter1 x USB Cable1 x Manual1 x Strap Note: 1. Fingers should be placed correctly and your fingers will shake during use.2. Avoid inserting when your finger has water.3. The small artery of the subject must pass between the photoreceptor tube and the illuminating tube of the oximeter.4. Do not have tape and other light obstacles where the light passes.5. Excessive ambient light can affect measurement results. Please cover or change the measurement environment properly.6. The subject's intense activity and interference from electrosurgical equipment can affect the measurement results.7. Cosmetics such as nail polish applied to the fingernails of the subject may affect the measurement results.8. The subject's fingernails should not be too long.9. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.