Extras are optional non-core rental items that you sell (or rent) alongside your core inventory.
e.g. a helmet, pedals, insurance, lights
some folks even use it for more 'abstract' things:
mountain ski pass, shuttle ride, cycling jersey, water bottle
They appear in your online booking alongside your rental items.
Plus they appear in your back office:
You can charge for them or they can be free.
You decide which extras apply to which type of bike.
- extras do not count towards your inventory count (BRM subscription)
- however extras do not track your inventory - so you need to have 'an unlimited supply'