1e41f4b71Sopenharmony_ci# Rdb_SubscribeCallback 2e41f4b71Sopenharmony_ci 3e41f4b71Sopenharmony_ci 4e41f4b71Sopenharmony_ci## Overview 5e41f4b71Sopenharmony_ci 6e41f4b71Sopenharmony_ciDefines the callback used to return the subscribed event. 7e41f4b71Sopenharmony_ci 8e41f4b71Sopenharmony_ci**Since**: 11 9e41f4b71Sopenharmony_ci 10e41f4b71Sopenharmony_ci**Related module**: [RDB](_r_d_b.md) 11e41f4b71Sopenharmony_ci 12e41f4b71Sopenharmony_ci 13e41f4b71Sopenharmony_ci## Summary 14e41f4b71Sopenharmony_ci 15e41f4b71Sopenharmony_ci 16e41f4b71Sopenharmony_ci### Member Variables 17e41f4b71Sopenharmony_ci 18e41f4b71Sopenharmony_ci| Name| Description| 19e41f4b71Sopenharmony_ci| -------- | -------- | 20e41f4b71Sopenharmony_ci| [detailsObserver](_r_d_b.md#detailsobserver) | Callback used to return the details about the device-cloud data change.| 21e41f4b71Sopenharmony_ci| [briefObserver](_r_d_b.md#briefobserver) | Callback used to return the device-cloud data change event.| 22