How do I charge the HODAY SM9126 Tens Unit Muscle Stimulator?

To charge the HODAY SM9126 Tens Unit Muscle Stimulator, follow these steps:

1. Plug the device into a wall charger, power bank, or USB port using the provided charging cable.
2. Ensure that the device is securely connected to the power source.
3. Allow the device to charge until the battery is fully charged. The battery level display on the unit will indicate the charging progress.
4. Once fully charged, disconnect the device from the power source.

It is recommended to fully charge the device before each use to ensure optimal performance.