Builtin power supply Built in performance lithium battery with over current protection and over discharge protection. Charging voltage 4.2V. Digital display and control Digital display with controls for illumination time, degree, and wind speed, enabling precise, user friendly operation. Wind performance Ultra silent infinite fan design provides adjustable wind while minimizing noise. Slower wind helps reduce thermal expansion and contraction stress on components. Optical performance LED double bead ultraviolet light source with power options 5W or 10W. Wavelength range 395nm400nm and 400480nm. Capable of delivering targeted UV illumination for compatible applications. 23 practical use scenarios On site UV curing: ideal for curing UV sensitive adhesives or coatings in electronics, jewelry, or smallscale manufacturing while away from power outlets. Portable experiments and testing: convenient for small lab or workshop tasks that require controlled UV exposure and adjustable timing. Field maintenance: suitable for curing or treating surfaces and materials during remote repairs and projects.