to oxidation. More efficient transmission. metal with strong tensile strength. Multiple protections technology provides short-circuit-protection, over load and overvoltage-protection. High working efficiency and fast charging speed. Magnetic charging: the built-in magnetic charging module can be easily to your watch. Convenient to without worrying about sudden loosening during charging. Fit for IP68/ SW021/ID205U/ID205S/ID205L/ID216/021/SW021/SW025/SW01/SW023/ 3/ / smartwatch. [NOTE]: you are unsure of the model, please . Applicable to multiple models, not only the data written out of the model. The probe spacing is 2.5mm, the magnetic suction spacing is 8mm can be used.