Versatile compatibility: This extension tool is designed to work seamlessly with all hair extension systems, including keratin straight hair, pre-bonded hair, hair bonding, nail hair, and stick hair. User-friendly operation: Even beginners can easily use this tool; simply turn on the power switch, and it's ready to go. Safe ultrasonic technology: Enjoy peace of mind while using this tool, as its ultrasonic function eliminates the risk of burns during operation. Effortless cleaning: The external teflon coating on the tip prevents keratin residue from adhering during welding, making cleanup quick and easy. Reliable performance: This extension tool is designed for efficiency, ensuring a smooth application process for all your hair extension needs.