Unimprinted - For the perfect tradeshow gift, go with this keychain calculator! It has batteries included and features an oblong shape, a split key ring, and a protective cover with a large imprint area. This is a fantastic way to boldly represent your business. Clients will love attaching their keys to this. The more they use it, the more you get seen! Add your company name or logo via pad print and become more widely known! Thai.