Plantronics M22 Amplifier Review

Overall good product. Setting up for a different type of phone line was quick and easy.
I have two issues with this device:
- an AC adapter is not included in the package!
- It was not stated that you don't necessarily need a Plantronics headset to connect the amplifier (which resulted in me buying one, when I already had one from a different brand)

Buy it here now!