Bluetooth LED Children Fingertip Pulse Oximeter Blue

ABOUT THIS ITEM:   Use Age: for kids from 2.5 to 15 year-old. Bluetooth: Supported Packing Demension: 8.8cm*7cm*4cm Item Weight: 34g Battery Required: 2XAAA batteries Packing List:  1 * kid pulse oximeter, 1 * user manual, 2 * XAAA batteries. Operation Guideline: 1. clipping the child pulse oximeter on the finger, 2. press power botton wait 8s (please make sure your finger and body do not tremble during measuring), 3. the SpO2 and pulse rate measurement value will show on the OLED display,  4. it will turn into the sleep mode in 10s automatically without opperation. 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.