OLED Fingertip Pulse Oximeter Black

ABOUT THIS ITEM:  Recommended Age: >12 Years Old Packing Demension: 2.36 x 2.76 x 1.97 inches Item Weight: 36g Battery Required: 2XAAA batteries Packing List:  1 * kid pulse oximeter, 1 * user manual, 2 * XAAA batteries. Operation Guideline: 1. install the batteries correctly, 2. insert your finger to the device infrared finger cavity, 3. press the button, turn on the power and start the measurement,  4. keep your body still while measuring and wait for the result. Attentions: Our device have positive and negative signs in the battery slot, so when installing the battery, first be sure to check the positive and negative signs in the battery slot to avoid installation errors.