Mitel Superset PKM48 Programmable Key Module Kit (Dark Grey/Refurbished)The Mitel Superset PKM48 Programmable Key Module features 48 additional programmable personal keys for Mitel Superset 4025, 4125 and 4150 phones. Each personal key can be programmed as a feature key, a speed call key, a line appearance key, or as a direct station select key. Two Superset PKM48 devices can be attached to compatible Superset 4000 series phones to provide up to 96 additional keys. More Information Part# 9132 200 202 The kit includes; SIM