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.