External unit with new mechanical buttons and call buttons featuring exclusive “Sensitive Touch” technology. Die-cast aluminium cover with protection rating IK08. Colour HD video camera, 4 indicator LEDs for call sent, door open, audio active and system busy, plus white LED for lighting purposes. Nameplate holder in versions with 1/2/4 programmable buttons. Surface mounting. Can be expanded up to 4 panels - Expansion code EX-DSQE. Only compatible with HFX-7000M, HFX-7000MW, HFX-8000M and HFX-9000M.