FeatureThis magnetic USB wireless charger compatible with Polar OH1 and Verity Sense only, NOT fit for Polar other model. (Smartwatch is not including)Fast and Stable Charging, the Wireless Charger offers fast charging speed for your device, fully charged your fitbit smartwatch only takes 3-4 hours. Plug it into the USB port of your computer, your car, socket, or power bank to start charging anywhere.This Cordless USB Charger with Pocket-size and portable design, you can carry this compact portable charger out easier rather than taking long and oversized charger dock, allows you to carry it out with more ease and fits into your pocket or bag easily. The keychain design allows you to hang with the keys to prevent loss, great for trips or traveling.Multiple Protections, built-in over-the current, over-voltage, short circuit, and over-temperature protection, offers you a safe environment for both watch and the charger.Built-in latest magnetic adsorption module, Charge immediately after contact. What You Get: 1*Polar OH1 Portable wireless USB Charger. Free Replacement without return for any quality issues within 12 months, 24-Hour Friendly Customer Service.