... without coolingSpotsize: 1.5mm, 3mm, 5mm, 8mm Er: YAG variable pulse&franctional 2940nmWavelength: 2940m,Energy: 0. ... 10ms,Spotsize: Fractional tip 5~12mmQ-switch ND: YAG 1064nm/532nmWavelength: 1064nm/532nmEnergy: 200~800mj,Duration: ... 8mm Q-Switch nd: yag laser 1064/532mm200~800j below 20ns 2mm, 4mm er: yag laser 2940nm 0.2 ... ~2j 0.5~3ms 1mm, 3mm, 6mm, 9mmfractional tip er: ...