Different wavelength can choose: 808nm, 755+808+1064nm and 755+808+940+1064nm. Different spot size choose: 12*12mm and 12*23mm New handpiece: weight:0.6KG only. and also add a screen to show the energy and temperature on the handpiece, more convenient. New handpiece connector: easy to take out and insert. Three different modes; fast mode, smart mode and professional mode for different treatment needs. Both the handpiece and machine provide 2 years warranty, the handpiece is no lit shots.