Features: 1. The deluxe version has many other helpful features like the plethysmograph and alarm. 2. It is manufactured according to CE and FDA standards for pulse oximeters used by doctors and other health professionals. 3. Optical frequency digital conversion technology, a new generation of blood sample algorithm. Description: Pulse oximeter uses a new generation of blood sample algorithm for higher measurement accuracy. Specifications: Color: black , dark blue, Sky blue black Material: plastic Working voltage: 2.6 - 3.6V Power consumption: not more than 25maA SpO2 measurement range: 0 -100% Pulse rate measurement range: 30 - 250BPM (resolution is 1BPM) Size: 51*31*31mm Package Included: 1 * Finger Pulse Oximeter Notes: 1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. 2. Please allow slight dimension difference due to different manual measurement.