Features: Compatibility: This charger compatible with Fitbit Sense or Sense 2 or Versa 3 or Versa 4 smartwatches. [Not compatbile with Versa 2, Versa, Versa Lite, Versa SE] Magnetic and Speedy: the Sense or Sense 2 charger with strong magnetic, securely hold and keep smart watch in place for charging. It works like the original, a full charge takes about 2.5 hours. Safety Protection: the Versa 3 or Versa 4 charger build-in smart chips protecting watch from over-current or over-charging. Convenience and Easy to Use: To get a charging, just plug the USB- A into USB port on your PC, laptop, notebook, wall charger or car charger. very convenient to charge your watch at home, in office, in car or on travel. Package includes: 1 x 3.3ft or 100cm charging cable compatible with Sense, Sense 2, Versa 3, Versa 4 (smart watch is not included). Compatibility: Compatible with Fitbit Sense Compatible with Fitbit Sense 2 Compatible with Fitbit Versa 3 Compatible with Fitbit Versa 4 Specification: Material: ABS Color: Black Input: 5V or 1A Cable Length: 1m or 3.3ft Package included: 1 x charger cable for Sense or Sense 2 or Versa 3 or Versa 4 (smart watch is not included) Please Note: We suggest using the computer, laptop or power bank to charge, as the current is more stable. 2. Do not use AC adapter which the power exceed 5V or 1A to charge, it may damage the watch or charger.