Great product but its been a month from that I have received it and I used it occassionally since that time. Untill now all was fine but now one of the laser (4 lines) are not working correctly - lines are barely visible. On the offer seller wrote that he give 1 year warranty for this product. I tried to contact two times to check what he can do in this situation but I still got no reply... I dont know if I will get any:(
good laser very fast siping