US$ 549.50
Supports multi-door interlock funtion and anti-pass back function
Stand-alone operation
433MHz two-way wireless communication
Video Bit Rate
Akuvox S539 Surface Mount Bracket Single Section Supports multi-door interlock funtion andOn Wall Mounting Back Box for Akuvox S539 Door Intercoms Surface mount Back Box Compatible with Akuvox S539 Door Intercom devices Steel construction