With regards to power output in joules per cm squared (j/cm2), the digital controls make it easy for you to program the laser for optimal treatments. Typically, most treatments will fall within the range of 3 to 20 joules per point. It will take just 7 seconds to deliver 3 joules of energy with the 808nm, 450mW cluster head. This is stored as M1 in the lasers memory for quick and easy application. With the 300mW single emitter head the M1 program will deliver 3 joules in 11 seconds and you can deliver 6 joules in 22 seconds. Super easy, fast and effective. Now you know why our customers rave about the superior quality and performance of the Laserex 3000 lasers.