[Automatic Timer Function: The device features a built-in timer that initiates a 420s = 7 minutes session automatically making it easy to integrate into your daily routine. Recommended Usage: For optimal results use the device for 7 minutes twice daily over a period of 3 months. Noticeable improvement can be observed as nails grow out in approximately 6 to 9 months. Dual Light Technology: This nail care device combines 470nm blue light and 910nm infrared light to gently enhance nail health by raising nail temperature safely promoting a healthier appearance. Simple Operation:Please clean your unhealthy nails before use. To use simply open the device and clamp it onto your finger or toe. The session will automatically start and it will turn off when complete allowing for hassle-free use. Suitable for Everyone: Safe for all ages including children and the elderly. Ideal for those with sensitivities; maintain proper nail hygiene by keeping nails trimmed and cleaning nail tools regularly. Important Purchase Info: Ensure the device is fully charged before initial use (90 minutes recommended). Consistent use is key for visible improvements in nail appearance.]