SUNMAY Voga 2 in 1 Cordless Hair Straightener and Curler--New Design with Better Performance The upgraded 2 in 1 Cordless Hair Straightener has higher performance. 1. Longer Battery Life: The battery capacity is 5000mAh. The working time can be up to 45 minutes with continuous use at a high temperature level. 2. Type-C Charging Port Design (This wireless hair straightener also comes with a USB cable). 3. Support Fast Charge: (1) It takes about 2 hours to fully charge the cordless hair straightener when the charging voltage is 5V and charging current is 2A. (2) It takes about 3 hours to fully charge the cordless hair straightener when the charging voltage is 5V and charging current is 1A. 4. 3 Temperature Levels: 165-185-205 The 165 is for thin/ fine/ bleached/colored hair. 185 is for normal hair. 205 is for medium thick hair.