COMES WITH 1 YEAR WARRANTY VAT INVOICE PROVIDED Package Contents: 1 x CMS50D+ OLED Fingertip Oximeter 1 x USB DATA Cable 1 x Software CD 1 x Lanyard 1 x English user's manual 1 x Carry Pouch Retail Packaging Key Features: The CMS-50D+ has a OLED display4 directional display allows the readings to be rotated and viewed from 4 different directions allowing easy to read for self-use and for carers as well. Audible pulse beep (can be switched on or off for monitoring) Internal flash memory for over 24 hours data storage. Data can be downloaded to a PC - PC USB cable and PC Software included on mini-CD. The Software enables real time transfer of data. Compact and easy to use with one-button operation. SpO2: • Measurement Range: 0 - 100% • Resolution: 1% • Accuracy: 70 - 100% +/- 2%, 0 - 69% unspecified Pulse Rate: • Measurement Range: 25 - 250 bpm • Resolution: 1 bpm • Accuracy: +/- 2 bpm Features: • Dual color OLED Display (blue and yellow) • USB port for interfacing with computer • Synchronously display data on oximeter and computer • Internal flash memory for 30 hours of data storage • User can setup alarm function • Software for sleep monitoring and analysis • Power Supply: Two 1.5V (AAA size) alkaline batteries • Battery voltage: DC2.6V - 3.6V • SpO2, Pulse Rate, Bar Graph, Pulse Waveform display, Low battery capacity indication