Akuvox S539 Russound it includes 3 output relays

it includes 3 output relays for access control

Includes an alphanumeric LCD display for easy programming and battery backup options for uninterrupted operation

with dimensions of 2

Mini Door Phone with Handset for Simplebus1

Compact dimensions: 212x115x50mm

Akuvox S539 Russound it includes 3 output relaysAkuvox S539 Video Door Phone for Multi Residential Buildings The Akuvox S539 redefines secure building access. This feature packed video door phone boasts a 10 inch touchscreen, over 15 entry methods (facial recognition, QR code, etc.), and dual HD cameras for crisp video. More convenient, more secure, and more interactive with 2 HD cameras, a QR code camera, infrared led, a 10 inch screen, 3 output relays, wiegand, RS485, one line out, 3 input ports,