This Flash duplicator is lightweight, portable, & easy to use. It comes with an AC power adapter. The flash duplicator makes it easy to copy data & check the quality & real capacity of your flash. The Checking Capability means that you can efficiently check for defective flash devices & the Capacity Check enables you to find out the real capacity of your flash device. The Measure Speed feature also helps you to check each flash device read & write speed. The light weight design of the UB300 makes it absolutely ideal for the service engineer as well as for retail stores.