Questions about Bontempi Bluetooth headset

Since these are children's headphones, I don't think they will fit. It can also be assumed that the sound quality / volume is not outstanding. You might find a better alternative here: https://www.digitec.ch/de/s1/producttype/kopfhoerer-48?p=64%3A198704&pdo=1179-9173%3A7565&so=5&tagIds=591