Featuring programmable emission times between 20 and 30 seconds, this curing light with LED technology is lightweight and extremely compact. It ships with a lot of handy features to include sighting light, controls located on hand piece, warning alert beep at start, at 5 second intervals and at end of emission, light guide, thermal and electric protection, LED time setting indicator and immediate emmision, activation key ( press key), release key at gradual release or at full intensity.