There are a couple of slightly cheap - feeling, touch - sensitive plastic buttons on the bottom edge of the headset that we weren't too sure about. (techradar.com)
Cheap versions have plastic buttons with four holes for easy machine sewing — sometimes even with the seal. (highlatitudestyle.com)
I hated it and quickly switched back to my old «analog» receiver, which has a number of simple plastic buttons and a knob for navigating around. (canadianbusiness.com)