Permobil Explorer Mini User Manual page 27

3.3.2.2 Cushion
The cushion is attached to the backrest from the start and is intended to
provide support to small children. It can be removed and attached as needed.
For instructions on removing the cushion, see 4 Adjustments.
3.3.3 Base module
The base module has functions for power supply and drive units. The drive
units are positioned inside the base module. Each drive wheel is equipped
with a drive unit that has an electric motor and a gearbox.
Getting to know your wheelchair - 27