HDMI Splitter10Remote Control Unit※ It’s possible to use a remote controller within 3~5m, 60 degree of angle scope.※ You can use an extension receiver for a remote controller if it’s far away from the system.The receiver in the system will not work when the extension reciever is connected.- Turn the unit off before connecting the extension reciever.Insert battery1. Pull out the insert part. 2. Insert battery after checking. 3. Push in the insert part.“+” polarity