Roll diameter:58 mm • extreme exquisite lightweight structure design is easy to carry • easy paper structure is easy to use and maintenance • equipped with large capacity client local program upgrade • equipped with windows computer end drive • equipped with wm, wince, symbian, presentation software and dynamic link library android platform • with oled display • bluetooth host function applications: • copy watch - electrical water meter charge • insurance - insurance field fast loss • warehousing, inventory / distribution / warehousing • parking - confirm parking time charge of statistics • logistics, express transportation invoices / goods delivery order • mobile sales - ticket / fast consumer goods such as mobile sales • police and police / management / business field enforcement / health supervision