Feature: 1. HIGHLY EFFECTIVE: Nail Blue Light treatment device uses Blue Light treatment to improve the appearance of nails in just a few weeks. Each session lasts for 7 minutes and can be done 2‑3 times a day. 2. BLUE LED LIGHT TECHNOLOGY: Nail treatment device features 470nm blue LED light for cleaning and 905nm infrared cold Blue Light for deep cleaning. 3. GENTLE AND SAFE: Nail cleaning device utilizes the heat generated by lasers to penetrate the nail, promoting the growth of new, clean nails without causing harm to the nail bed or cuticles. 4. PORTABLE : With its compact and lightweight design, this device can be easily carried and used anywhere. It is also equipped with a built in lithium ion battery for convenience. 5. EASY TO USE: Simply place the device on the affected nail, press the button, and let it work for 7 minutes. It will automatically shut down once the session is complete. Specification: Item Type: Nail Blue Light Treatment Device Material: ABS Battery Type: Lithium ion Battery (built in) Battery Capacity: 1300mAh Light Source: 470nm Blue LED Light for cleaning, 905nm Infrared Cold Blue Light (Friendly reminder: 905nm is invisible light, can be seen with the help of a camera). Package List: 1 x Nail Blue Light Treatment Device1 x USB Cable1 x Instruction Manual