Belay is On

When 2 climbers can't hear each other on a multi pitch however there is reception, they can say 'Hey Moses' and then one of the commands: Off Belay, Belay is Off, Belay is On, Climbing, Climb On, Take. The command will be transmitted to the other group members. Please note that you also need to install a companion app named Belay is On Speaker in order to receive commands.