Replacement USB charger Only compatible with Fitbit Alta HR Heart Rate Fitness,not for any other models. No reset function.Note: Fitbit Alta HR Fitness Tracker and Band are Not Included. Safety Design: This Fitbit Alta HR charger has a voltage regulator inside (Built-in voltage regulator protects) to protect your Fitbit from being damaged by overcurrent and short circuit.NOTE: Please plug into the USB port onto PC, Laptop, Mac or Notebook. If you connect it to the adapter,the adapter current must not exceed 1A. High Quality and Durable: Made of high quality wire, this replacement charging cable for Fitbit Alta HR 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 Ample Reach. Extra Replacement Charging Cable to Give Your Fitbit Alta HR Fitness Tracker a Boost in the Office, at Home, in Car or in Travels! Safety and fast charging with lightweight and compact You can put this Extra Long replacement charging cable into your purse, backpack and glove box, keep one at home, take the Replacement USB Charger Charging Cable in the office, car or travelling Protect your Fitbit tracker from being damaged by overcurrent or short circuit. Provide you safety and fast charging Colour: Black Material: Plastic Package Contents: 1* Charging clip Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.