The Product Specification: 1.Dimensions: 5.3*3.4*0.58Inches 2.Weight: 55G 3.Input: 5V 4.Output: 5V / 1A 5.Adapter: 5V / 2A 6.Port: Usb-A 7.For Models: Fitbit Versa3/4& Fitbit Sense/Sense2 Portable & Lightweight: 1.Pocket-Size And Mini Design, Allows You To Carry It Out With More Ease And Fits Into Your Pocket Or Bag Easily. 2.Never Worry About Taking Long And Oversize Charging Cable Or Charging Dock. You Can Hang In The Keychain Or Bag. 3.The Keychain Design Allows You To Hang With The Keys To Prevent Loss, Great For Trips Or Traveling. In The Package: 1* User Manual 2* Fitbit Sense/Sense2 / Versa 3/4 Watch Charger
