How to Use: Simply open the device and attach it to your finger or toe. It will automatically start a 7-minute session. Once the lights turn off, your session is done, and you can remove the device. Consistent Use Required: For best results, use the device twice daily for 7 minutes each time, over a 3-month period. You may observe changes as your toenails grow, which typically takes 6 to 9 months. Effective Blue &Infrared Light: This device combines 470nm blue light and 910nm invisible light for a gentle approach. It raises the toenail temperature to a range of 109.4 to 123.8, which can help with nail concerns. Safe for All: Designed for all, including the elderly, children, and those with liver/kidney insufficiency or pain sensitivity. Maintain good nail by keeping nails trimmed and cleaning nail tools. Purchase Notes: Ensure the device is fully charged before your first session (90 minutes is recommended). Consistent use is essential for enhancing nail health.