Specification Product name: Bluetooth plastic ring electronic counter Material: plastic Battery capacity: 40mah Applicable system: Android 5.1/Apple 10 (or above system) Charging interface: 5V BT: BT5.1 Screen: OLED Screen size: 64*32 inches Button: 1button Color: black/break/pink/green/red Appearance size: 32*12mm/1.26*0.47 inches Model: US 8 / US 10.5 / US 12.5 This smart ring features a ring-style design that can be easily worn on your finger. Its soft plastic material ensures a comfortable wearing experience without causing discomfort or pressure on the finger. The smart ring is Bluetooth-enabled and can connect wirelessly with your smartphone, so you can conveniently manage and control the functions of your ring. Whether you use an Android 5.1 or Apple 10 or above smartphone, it is compatible with this ring. Whether you are an Android user or an Apple user, you can easily enjoy the convenience of the smart ring. To meet the personal preferences and needs of different users, this smart ring is available in five different color options. Whether you prefer simple black, fashionable red or fresh blue, you can find the right color for you. There are also large, medium and small sizes to choose from to ensure the ring fits and is comfortable. This smart ring features a time reminder and an electronic counter. It can remind you of important schedules and events through vibration or a slight beep. In addition, it can record your exercise steps, calories burned and other related data to help you better manage and track your health and activity.