[Home](./index.md) > [bitburner](./bitburner.md) > [Sleeve](./bitburner.sleeve.md) > [setToSynchronize](./bitburner.sleeve.settosynchronize.md) ## Sleeve.setToSynchronize() method If you are not in BitNode-10, then you must have Source-File 10 in order to use this function. Return a boolean indicating whether or not this action was set successfully. Signature: ```typescript setToSynchronize(sleeveNumber: number): boolean; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | sleeveNumber | number | Index of the sleeve to start synchronizing. | Returns: boolean True if this action was set successfully, false otherwise. ## Remarks RAM cost: 4 GB