I was first sent the incorrect item, which was exchange without question. On recieving the correct item my I.T. guy said it appears to be used, and there is a crack in the casing. I am not returning it again cause it is simply too much effort and the seller is not extremely efficient in their correspondence. Despite this the product does appear to work well. I'll use the seller again with a little reserve. Thank you Perkal Gifts for your service. Please viewed this as positive criticism.