As a service to our visitors with hearing impairments, the Calumet Visitor Center has been equipped with DURATEQ handheld assistive listening devices. The devices provide amplified sound for several exhibits and for the film presentation. The devices are available for check out, free of charge, at the Calumet Visitor Center information desk. Guest information will be required as a deposit. Arrangements to use a handheld device can be made by calling (906) 337-3168.