附带功能 meaning in Chinese

attach feature

All of those have this and that kind of shortcomings , such as complex operation , incapable of taking on hand , and so on . especially , the function of exchanging and managing business cards is accessory to the main systems , so it only works among same products
与名片相关设备，或者存在管理方法复杂的缺点，或者不易携带，再者因为都是作为通讯、管理系统的附带功能，只能实现本产品间的名片交换。