5 probes(1064nm probe, 532nm probe, 1320nm probe, 755nm probe, lp1064/532 probe) are suitable for all skin types.specially, we equipped with 755nm honeycomb probe more gentle for treatment pico laser with 1064nm 532nm 755nm 1320nm 4pcs of working laser wavelengths available. no melanin precipitate, fast effective and painless. picosecond laser with imported japan laser infrared aiming beam, professional 755nm focus lens array head laser spot size is 1 to 10mm adjustable.we have detailed user manual and operation video for you reference, please do not worry about it. 10 million s can make you use a long time,truely high cost performance..syi