This Rolence Tray-LED consists of 12 LED chips as light-source and a drawer for in-and-out of impression tray; LED light-source features extremely long life time and stable light-energy exposure (rarely declines). Its effective wavelength range is from 380~420nm (Peak 405nm). It is intended to be used by dental professionals to polymerize light-activated impression tray. The product also features: ? Digital timer display: timer selection from 10 seconds to 9:50 maximum. 10 second interval of each setting ? Widend chamber, capable of 2 trays maximum at the same time. ? A high-performance cooling fan prevents the chamber from extra heat. ? Safty switch functions to interupt light emmiting in order to protect operator. ? Light-energy intensity over 8.0 mW/cm², much higher than that of competitors (tytically 4.0 mW/cm²). ? Smaller dimesion in overall for optimal counter space saving. ? Audible beeping notice when curing process is completed.