●Replacement USB charger only compatible with Fitbit Charge 4 Fitness,not for any other models. No reset function. ●Safety Design:KingAcc Fitbit Sense/Versa 3 charger has a voltage regulator inside (Built-in voltage regulator protects) to protect your charger from being damaged by overcurrent and short circuit.NOTE: Recommend using,please plug into the USB port into PC, Laptop or Notebook. ●High Quality and Durable:Made of high quality wire, this replacement charging cable for Fitbit Sense/Versa 3 can stand 2000+ times insertion-and-extraction tests.Compact and lightweight design, convenient for travelers and business users. ●Cable Length:100cm.Extra Long Length For Enough Reach. Extra Replacement Charging Cable to Give Your Fitbit Sense/Versa 3 Fitness Tracker a Boost in the Office, at Home, in Car or in Travels! ●Over-Voltage & Over-Current Protection: Our replacement Fitbit Sense/Versa 3 charging cables provides fast and stable charging speed. Made of over- voltage and over-current protection, they will protect your Fitbit Sense/Versa 3 from being damaged when charging.