1, finger oximeter CE certified 2, OEM brand accept 3, SpO2 ... and 7-segment digital display Pulse wave’s intensity display: 6-segment bar-graph display Low battery voltage indication: Segment ... power off automatically in 8 seconds when there is no finger in the devices.11, Photosensitive components: red light ( wavelength : ... A hanging rope2, Four batteries3, A pouch4, A User Manual finger oximeter