The Oxi-Go QuickCheck Pro Finger-Unit Spot Check Oximeter is perfect for sports and aviation with its small & lightweight design and dual color high resolution easy to read OLED displays SpO2, Pulse Rate, and Pulse bar. Utilizes low power consumption an automatic power off, with approximately 30 hour normal operation. Has a low battery indicator and uses 2 AAA alkaline or rechargeable batteries. Accommodates widest range of finger sizes from pediatric to adult and comes with a 2 year limited warranty. The SpO2 Measurement range 70-100% with Resolution 1% and Measurement accuracy 80%-100%; ±2% 70%-79 %; ±3%. The Pulse Rate Measurement range 30-235 bpm with Resolution 1bpm and Measurement accuracy 30 – 100; ±2 bpm 101- 235; ±2%. This product complies with IEC60601-1-2 for electromagnetic compatibility Class B. Deviation is smaller than ±1% between values of Oxyhemoglobin measured in natural lighting indoor condition and present lighting sources and that measured in dark room. The QucikCheck Pro has a Dual color High Resolution OLED display with 4 display modes for easy reading from all sides and has 10 levelsDimension 2.3 in(W) x 1.3 in(H) x 1.3 in(D). Weight 0.09 lbs(without batteries)