Yes, this trimmer can be used in the shower because it is 100% showerproof. It is designed for cordless use only, which ensures safety while using it in wet conditions.

Yes, I can confirm that It also says "waterproof" in the specifications

Yes, the Philips Multigroom Series 9000 trimmer with the model number MG9530/15 actually comes with the OneBlade as an extra. Both the all-in-one trimmer and the OneBlade including the original blade are included in the scope of delivery.