Here is a more detailed description of the product and what is included in it:

Bicycle seat for children from 9 months of age
Suitable for up to a maximum weight of 22 kg
Test winner at Stiftung Warentest (03/2018)
With integrated padding
Ergonomic, adjustable sleeping position (20°)
Height-adjustable backrest
3-point harness system with shoulder straps
Different models: easy and safe to fit on bikes with and without luggage racks
Reflectors on the back provide better visibility
Innovative one-handed adjustable footrest system
Mounting bracket is lockable
Helmet mount for ideal comfort
A mounting adapter is included in delivery