It has the merits of low working temperature, good anti-interference percompatiblemance, 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 compatible OPPO Band Style SpO2.Item Name: ChargerMaterial: ABSColor: BlackInput Voltage: 5VOutput Voltage: 5VOutput Current: 700MAInterface: Probe InterfaceCable Length: 30cm/100cmCompatible Model: compatible OPPO Band Style SpO2Features: Safe, Fast Charging, High EfficiencySize 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)