A portable, feature rich pulse oximeter that provides spot readings of SpO2 and heart rate for the busy healthcare professional. The 2100 features: Reads SpO2 and Pulse Rate Accuracy: SpO2 ±2-3% / HR ±5 BPM 6 changeable display modes 10 Display brightness settings 25% smaller than competing models Fits fingers with a thickness of .31” to .79” (8mm to 20mm) Dual color OLED display Hinged battery cover is more secure Complete with Carry Lanyard and Black Rubberized Bumper. (Optional orange bumper sold separately) 2 “AAA” Batteries Instruction Booklet 2 year limited warranty Meets or exceeds ISO 9919