?Considerate Service?: Considerate service of one-year warranty and thirty-day return and refund, provides you with perfect shopping experience. ?2 same Chargers inside the package?: You can charge Fitbit Sense / Sense 2 / Versa 3 / Versa 4 together. you also can keep one at home, and put the other one with your power bank, or keep them just in bag to charge your watch by your car’s USB, or Laptop’s USB power in office. ?Security?: There is Build-in Short-circuit protection IC in this charger to avoid overvoltage and overcurrent. If the charger meets short-circuit situation, the protection IC will cut off the circuit automatically. If you forget to unplug the charger after charging, the Protection IC will keep the safety. ?Upgraded Strong Magnet?: After market research, we have made key upgrades for the magnetic suction part to ensure strong enough suction. ?Perfect Compatibility?: Replacement 3.3 FT Charger Cable Only for Fitbit Sense / Sense 2 / Versa 3 / Versa 4 Smartwatch.