The LEM-1DL master station provides communication to and from a door station and has a separate button for door release. FEATURES Provides communication to LE series door stations Voice volume control Push-to-talk communication Door release (N/O contact) SPECIFICATIONS Power Consumption: 4W (16V AC) max., 200mA (24V DC) max. Output: 100mW Type of communication: Push-to-talk (simplex) Door Release Contact: N/O dry contact, 30V AC/DC 1A Mounting: Wall or desk mount Wire Type: 2-cond., overall shield - use Aiphone #822202(22AWG) or #821802(18AWG) Wire Distance: Door Station to Master Station: 650'(22AWG) 1,600(18AWG)