The lunch box No. 5 tactical m2 hard drive box is of good quality. The main control chip of realtek9210b supports nvme and sata dual protocols. The price of 159 is suitable. The box comes with a small piece of thin thermal conductive silica gel. In order to achieve better results, prepare a small piece of metal that is attached to the main control chip and contacts the bottom surface. The outer shell can better ensure the heat dissipation of the main control, thereby achieving higher stability. The hard drive box has two lanyard places for easy storage and portability.