Hand Warmers Rechargeable 20000mAh Electric Portable Pocket Hand WarmerPower Bank Heat Therapy Great for Raynauds Arthritic Sufferers Pain Relief Great Winter Gifts in Cold Wether Winter

How to use it? One button controls it all. Press the button, the LEDs light up—it’s on! Once on, Short press Twice each, (heat 1 / heat 2) means side 1 or 2 will heat. Long press (4-5sec), power off. Note: When this hand warmer is used as power bank or charged, the heat function will turn off for safe. Specifications: Capacity: 20000mAh Product net weight: About 540g Size: 2.8*8.3*16.6cm Charging time: 7-8 hours Working Time: 7-14 hours (The lasting time depends on external temperature and heat settings) Packing list: 1* 20000mAh rechargeable hand warmer powerbank 1* Type-C USB cable 1* User manual Tips: --Please Keep away from water. --DO NOT charging and heating simultaneously. --Please stored in a cool dry place when not in use. --Put on Cloth pouch to avoid burns when they get too hot for skin contact especially say on the wrists or behind knees where skin is thinner and more fragile.