M400 alarm:- Complete remote - MRC400
M450MKII alarm:- Complete remote - MRC450NZ
M450MKi - discontinued
Replacement plastic case: Part# 242021

These Mongoose remote controls had a 'fixed code'. 303.6MHz
Replacement remotes need to be coded by us to suit your alarm system.
The code is printed on a white label inside an existing remote control. To order a replacement, quote the above part number and the remote's code number