Specification: Buttons: On\/Off\/Rev switch Superior quality and compact size Keeps your documents safe and confidential Perfect letter opener and shredder for desk top For destroying of family and office documents (not for credit card) Low power consumption Power Supply: USB interface， 4 x AA battery or AC 230V\/110V， DC 6V 1200mA adapter (not included) Delicate and compact size， space-saving USB port via computer (plug and play， no driver needed) Size: Approx 17x13x15.5(cm)  Package Included: 1 X Mini USB Papar Shredde