Oxiline Pulse 9S Pro. Like new. Used twice. Petented VTEC™ nano sensors use four optical multiplex transmitters to provide accurate results every time. OLED display that features bright multicolor digits. Accurately determine your SpO2 (blood oxygen level) in under 7 seconds and easily view results with large digits. Shows your PI in real time it helps determine if you’re taking your pulse rate properly. BOGO items = Buy 1 & Get 1 of = or < $ Free!