Newest technology SMD ultra high output flashlight. Cures Solarez resin with the correct wavelength. Typically cures Solarez resin in 30 seconds or less. Also has heat-abating "Pulse Power" function. This reduces resin shrinkage and yellowing and increases bond. Comes complete with one rechargeable 18650 Lithium Ion battery and digital battery charger, good for hours of high-intensity light and hundreds of re-charges. Charger has polarity indicator warning and READY signal.The "Roadie" kit contains a small but powerful flashlight that uses a single AA battery. It has a focal point of about 1/2 the area of the other two torches but that area (about 1" diameter) is larger than most areas you will probably ever cure at one time. AA batteries are inexpensive rechargeability to come by.All torches function VERY well but the rechargability and power and pulse function of the largest one makes it a great torch. ALL 3 LED torches utilize the same SMD chip technology and are an incredible buy of technology that we have in our time. Like smartphones, one of the really great little bits of affordable technology Solarez has.Features Include: