The symbol ls3578 er rugged cordless scanner provides the greatest working range of any available rugged scanner allowing employees to scan items from as close as 4 inches10 cm to as far away as 45 feet 137 m it also allows employees to quickly switch from reading bar codes on inventory to capturing smaller symbologies on bar code menus and pick listsin the yard warehouse distribution center manufacturing plant or retail store the symbol ls3578 er offers superior performance and relia