A portable, high-performance label maker, the LabelManager™ 420P features a convenient rechargeable battery pack, a large backlit display and a user interface with quick access to keys, fonts and text effects. Connect the unit to your PC or Mac™ and use DYMO Label® software to design labels on your computer screen with barcodes, logos and graphics – or to print batches of labels from text in spreadsheet or database files. Plus, store up to 15 frequently-used labels for quick access and efficient printing. Compatible with Windows™ 7 or later and Mac OS™ X v10.8 or later. Power Source(s): Rechargeable Batteries (Included); Tape Size: 0.25"; 0.38"; 0.5"; 0.75"; Number of Printed Lines: 4; Printing Speed: 0.5"/s.