Hi-Fi headphone offers high quality sound performance.Built-in rechargeable Li-ion battery.\r\nDIY design, available to be detachable when you want. The low power warning lets you know that the battery is not enough and needs to be recharged.\r\nThe sound reminder function makes it easy to set up the device based on the sound reminder.

• Hi-Fi headphone offers high quality sound performance.
• Built-in rechargeable Li-ion battery.
• DIY design, available to be detachable when you want.
• The low power warning lets you know that the battery is not enough and needs to be recharged.
• The sound reminder function makes it easy to set up the device based on the sound reminder.