Devices for Keeping the Locking Key

I am in a long distance relationship with my Mistress. She holds one key and I hold the other. There are devices available to lock the chastity key (I lost the saved page due to a computer failure) and I need to locate them again. Some of these can even be controlled by my Mistress over the internet. Can anyone assist me? I have been searching but haven’t had much success.

Thanks