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1. Bass operation without disturbing sleep. 2. Removable grille for easy cleaning. 3. Four-speed wind adjustment, free to switch. 4. The index icon shows the power. 5. Two power supply modes: USB wired charging and battery. 6. Built-in 4000mAh battery, long-lasting battery life, get rid of wired restraint. 7. The USB charging interface can be connected to a variety of devices, such as computers, power banks, and mobile power supplies. 8. The design of the bottom silicone pad is non-slip and stable.
