Features: 【Charging Function】We provide a USB charger to save you the trouble of buying batteries. The device can be easily turned on/off with the power switch. The volume can be easily adjusted with just a screw rotation. And he can be charged anywhere there is a USB socket, such as a company computer, a home socket, etc. 【Lasting All Day】: It's time to upgrade your products and forget about always running out of or replacing batteries. Now, energy-saving rechargeable batteries can provide you with longer battery life and charging intervals. Without having to change batteries all the time, you can freely do what you like .
