So random, but hopefully someone has a suggestion!

I go to bed earlier than my husband and in our new home, his study (where he spends his free time in the evenings) is on another floor and at the opposite end of the house. Sometimes I need to have him come back to the bedroom at night, but it's too far for him to hear me call him and too far for me to walk all the way to him.

How can I call him back without also waking up our LO? Any ideas?

He said I could call him on the phone, but the reality is that he doesn't pay attention to his phone.