Perfect fit for Vivosmart HR, HR+, Approach X40 activity tracker. Replacement charging dock for Vivosmart HR, HR+, Approach X40. Power Protection Inside: keep your smart tracker safe from over-current or over-charging when connected to power source. Compact and lightweight design, convenient for travelers and business users. Item Name: USB Charger Dock Material: TPE + Plastic Quantity: 1 Pc Suitable for: for Vivosmart HR, HR+, Approach X40 Features: Durable, Easy to Use, Portable, Useful Length: 1m/39.4inch; (Approx.) Notes: Due to the light and screen setting difference, the item 39;s color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x USB Charger Dock