For the suspension there is a catch, or a small hole on the back, suckers, and a stand. The suction cups and the stand can be removed easily. Now it hangs safely on nail.
The ticking is unfortunately audible. To my mind it is a bit too loud. But since it depends in the bathroom it's ok for me. For the living room, it would bother me.
The first delivery was defective because the hour hand was not fixed. However, the return label I could easily print on Amazon. The return was also problem because our DHL man has simply taken the return in the delivery of replacement watch again. He printed out quickly and on the spot with his reader the return slip. Toll!