Xiemin Replacement Portable Charging Cradle Charger Stand Dock for Jawbone Up2 Up3 Up4 Fitness Activity Tracker(jawbone Up3 Up2 Up4 Charger) Only Compatible with Jawbone Up2/Up3/UP4 Fitness Activity Tracker Easily to use, just put your Jawbone Up2/Up3/UP4 Activity Tracker on the charger, then connect the Standard Micro USB Charging Cable to charge! Special magnetic plug design, strong suction. Please Kindly Note: It just only for Charging.