Features Replacement handset for Merlin Standard and Merlin Speakerphone (BIS) telephones Compatibility: Compatible with Merlin 5 Button, 10 Button, HFAI-10, 22 Button, and 34 Button telephones Compatible with Merlin BIS-10, BIS-22, BIS-22D, SP-34, BIS-34, and BIS 34D telephones Includes Refurbished
