Black smart watch smart band fitness watch unisex

Screen size: 0.96 inch oled 96 * 96 * Screen type: OLED * Waterproof level: IP54 * Bluetooth: Bluetooth 4.0BLE (low power) * Battery type: Polymer battery * Battery capacity: 70mAh * Charging time: about 2H * Life time: about 7-10 days * Charging mode: USB dedicated charging cable * Control mode: key control, mobile phone APP control * Blood pressure heart rate sensor * Compatible systems: Android 4.3 and above, iOS 8.0 and above * Features: dynamic and static heart rate, blood pressure, Gift