Choosee AUIIAH 2 pack hand warmers, warm the whole winter? ? Hand Warmers Rechargeable 2-Pack Design --- Warm your both hands. Small-sized-Ergonomic Design --- One-handed grip. Elastic Silicone Rope --- Easy to carry. Easy To Use --- usb hand warmers rechargeable are easy to use. Know Your Temperature --- Adjusted 8 heating mode and 4 levels heating. Long Press Switch to Turn on/Turn off the power. Turn on is Single-sided heating for the L1 Level 100.4-105.8? Long press the TEMP control for 3s to switch between single and double-sided heating. L1/L2/L3/L4 for single-sided heating. H1/H2/H3/H4 for double-sided heating. Short press the TEMP control to switch the temperature, 2 Level is 107.6-113?,3 Level is 114.8-120.2?, 4 Level is 122-127.4?. Relieve and Relax --- It can warm the hands, feet, waist, abdomen, back and knees and help relieve pain or fatigue. Single/Double-sided Heating This heated hand warmers can single/double-sided heat up in 3 seconds, which makes you get warmth instantly in cold weather. 3 in 1 2 Pack Hand Warmers Rechargeable & Power bank Easy for touching, holding and feeling. It's not only a little handwarmer but also a night light. With LED Light and Display Rechargeable hand warmers for women built-in with LED light to provides lighting in the dark. And the LED Display to Displays the remaining power or the heating levels.