Keep your hand and heart warm in chilly day. Small, beautiful, fashionable, easy to take FDA Certification 1. Working Current: 750MA, Charged Current: 400-450MA, Charge time: 2 hours2. Temperature: 1) One Gear power switch: 38 -42°C (constant temperature) 2) Two Gear power switch: Level 1: 38-42°C, level 2: 46-50°C;3. Indicator light: The light flicker when charge, it will turn on when the hand ...