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 or 100cm. It is compatible with 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)