2. Rechargeable: The wig extension UV light is built in 5000mAh lithium battery for longer use. It just needs 3 to 4 hours of charging, provides 1.5 hours of continuous use. 3. Versatile Application: Our hair extension UV light can be used on different parts of the hair, including the top and sides, offering flexibility in styling to suit your preferences. 1. Instant and Professional: The UV light blends the wig extension quickly with your own hair, providing salon quality results , with 6pcs 395nmLED UV beads. 4. Convenient to Use: The hair extension glue light simplifies the extension process, making it convenient for both home and professional salon use.