The ET4X Four Slot Cradle Conversion Cup Kit is designed to seamlessly transition from the ET5X ShareCradle. This kit includes one cup and requires a T-adapter, which must be ordered separately. The manufacturer part number is CRDCUP-4S-ET5TOET4, and it is produced by Zebra. This conversion kit provides a reliable solution for users looking to upgrade their cradle setup, ensuring compatibility and efficiency in device charging and management.