The headsets have been updated with a new look, improved ergonomics, and simplified usability. The Snom HS-MM3 headset is made specifically for use with the Snom 300 phone whereas the HS-MM2 headset is used for the Snom 320, Snom 360, Snom 370, Snom 820, Snom 821, and Snom 870 phones.
Headsets allow their users a much wider range of movement than possible with a telephone receiver. This investment is worthwhile for anyone who spends a an office, in a home office, or in a call center - a headset offers many advantages. The new snom headsets have one ear pad which can be worn on either ear. They are very sturdy and offer good wearing comfort. The microphone is noise-cancelling and suppresses background noise so that you do not need to compromise on quality.
Please check the following table to see which headset is designed for which phone: