DescriptionSpecificationsImages & VideoResources Description Quickly and easily measure your Pulse and SpO2 rates with this handy portable tester, with a clear OLED display and long battery life you can have it ready to go at a moments notice. The dislay can be rotated, allowing you to easily read the measurements from any angle. Sorry, your browser doesn't support embedded videos. Features: High quality ABS shell. Rechargeable Litium battery provide 5-8 hours runtime. Charges through a USB cable in 1-1.5 hours. Small, portable size, only 61.8*33.1*26.3mm. Clear easy to read OLED display with 4 way rotation. Complete with Carry Case, Lanyard and English Instruction Manual. Ideal for Healthcare and Sports. Auto shuts off after 8 seconds if not finger detected. Specifications Display Type: OLED display SPO2 : Measurement range: 70%～99% Accuracy: ±2% on the stage of 80%～99%; ±3% on the stage of 70%～79%; Below 70% no requirement Resolution: ±1% PR: Measurement range: 30BPM～240BPM Accuracy: ±1BPM or ±1%(the larger one) Power: rechargeable lithium battery Power consumption: below 30mA Automatic power-off: The product power off by itself when no finger is in the product ≥8 seconds Dimension: 61.8mm×33.1mm×26.3mm Operation Environment: Operation Temperature: 5 ºC～40 ºC Storage Temperature: -10 ºC～40 ºC Ambient Humidity: 15%～80% on the operation 10%～80% in storage Air Pressure: 86kPa～106kPa Declaration: The EMC of this product complies with the IEC60601-1-2 standard. Additional Images & Videos Resources A copy of the manual can be downloaded here Basic Operation: Pinch the clip to open. Insert your finger into the oximeter (finger down, nails aim at the infrared source) and then release the clip. Don't shake, Keep your fingers stable. When the waveforms are consistent, read the relevant data directly from the display screen. NOTE: Nails can't be too long, Will not work through printed/acrylic/bright nails. Finger must be dry.