Amazon.com: MAGNUM MAGN-ME-RSA / Remote Switch Adapter, MFG# ME-RSA, Is a pigtail adapter designed to provide a simple on/off remote switch. Used with a SPSTswitch. Compatible with ME, MS and MSH-M Series. :
Sennheiser EHS Adapter for Alcatel MSH - IP Touch 8 + 9 series Phones | Avcomm Solutions
Protos 700 Servo Horn Adapter Futaba | HeliDirect
Accessories • MSH Electronics
XLpower - MSH Servo adapter Set - Acrowood Helistation
Jabra Business 14201-36 Alcatel MSH Adapter for sale online | eBay
Jabra MSH Adapter - TheTelecomSpot.com
MSHeli FrSky Adapter Cable [MSH51645] - HobbyTown
MAGNUM MAGN-MM-ISA / Ignition Switch Adapter, MFG# MM-ISA, Allows the inverter to be turned on/off with a 12v olt signal. Compatible with ME Series, MS Series and MSH-M Series.