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 algorithms. Description: A pulse oximeter uses a new generation of blood sample algorithms 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