Features: Compatibility: This charger compatible with Fitbit Sense/Sense 2/Versa 3/Versa 4 smartwatches. [Not compatbile with Versa 2, Versa, Versa Lite, Versa SE] Magnetic and Speedy: the Sense/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/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/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/1A Cable Length: 1m/3.3ft Package included: 1 x charger cable for Sense/Sense 2/Versa 3/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/1A to charge, it may damage the watch or charger.