Norstar amplified telephone handset for Nortel M7000 series. M7100, M7208, M7310, M7324, and Meridian handset for M2000 series: M2006, M2008,and M2616 phones. All Meridian SL-1 Telephone Systems. This handset has a volume control wheel so you can adjust the volume at your convenience. This is just the receiver, not the entire telephone.