I always carry an ISO reader for my dog when we come over for a 6 montn stay in the USA. I have had to use it a few times. Disaster struck when the reader stopped working. Searching the internet I found CPS and the pocket hero reader. Looked too good to be true but I ordered it. Arrived quickly and was soon plugged in and charging but I kept all the packaging. It read the chip with it no problem. I tried it on Burt and up came his microchip number. Very easy to read and 'pocket' is right - this is so easy to carry with me. Thoroughly recommend it for peace of mind. Sensibly priced. Only comment would be, would have preferred a quieter colour than the choice, still it won't be easily lost!