Rocket Car Seat Adaptors These car seat adaptors are an optional accessory which allow you to add a Group 0+ infant carrier car seat to your Jané® Rocket pushchair. Turning it into an all-in-one travel system.  Adaptors are compatible with the following Pushchair models: Jané - Rocket II (check you have the correct version, as it\'s not compatible with older Jane Rocket 2019 models) Compatible car seats include: Jane - Koos, Jane Koos iSize, Jane Nest