While at any other setting, the handset will not work when the battery is drained. If any problem arises in using your telephone, disconnect the handset amplifier from the telephone. Re-connect the handset to the telephone. If the problem disappears, then your handset amplifier needs to be repaired. If the problem does not go away when you disconnect the handset amplifier, then the problem lies in your telephone or in your telephone line.
Proof of purchase is required.