Advice for Aurora AOne 250W smart switch

Hello - im from the UK and looking to buy Advice for Aurora AOne 250W smart switch.

I have very little knowledge of how kight switches work and how they interact with the lights. What are the things i should be checking before i purchase this product? I see that it doesnt need a neutral wire however im pretty sure my switch has one - can i still use the light switch?

Any advice is appreciated!