It has the merits of low working temperature, good anti-interference performance, fast charging speed, high efficiency and long service life. The watch charger is safe to use due to its short circuit, over-voltage, overload and overpower protection. It is made of high-quality ABS material, which is reliable and durable. The cable length of the product is 30cm/100cm. It is compatible for OPPO Band Style SpO2. Item Name: Charger Material: ABS Color: Black Input Voltage: 5V Output Voltage: 5V Output Current: 700MA Interface: Probe Interface Cable Length: 30cm/100cm Compatible Model: for OPPO Band Style SpO2 Features: Safe, Fast Charging, High Efficiency Size Details: Cable Length: 30cm/11.81", 100cm/39.37" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Charger (Bracelet Not Included)