Fashionable Doughnut Hand Warmer USB Portable Color:Blue The 220 mAh battery delivers

The 220 mAh battery delivers up to 10 hours of music playback (at 40% volume) after a 2‑hour charge

the sensitivity is not a quality problem

the signal strength will be shown on the display

A variety of colors

Fashionable Doughnut Hand Warmer USB Portable Color:Blue The 220 mAh battery deliversProduct information: Size: 8. 1 * 8. 1 * 3. 3cm Power mode: USB Rated voltage: 5V Rated power: 0. 5 Heating mode: electric film type Color: blue doughnut, pink doughnut, blue rainbow with light (with light), pink rainbow with light (with light), random doughnut, blue snowflake, pink snowflake Built in battery capacity: 1200mA 2000mA Endurance: 3 6 hours Packing list: Hand warming treasure * 1 power cord * 1