Made in China
4.Product weight: 105g Product size: 70*72*23 mm ( Wristband in not included) Wristband range: 135~195mm Pressure sensing: semiconductor pressure sensor Power supply: 2 Section 7 battery (not included in the package) - Oximeter - Suitable for sports enthusiasts like mountain climbers skiers bikers aviators or anyone is interested in measuring their SpO2 and pulse rate. The fingertip oximeter is not intended for the treatment you re advised to go to the hospital for medical treatment and rest more for a healthier body.