8K1S/DC/CL. This surface mounted 8K series 1 way audio intercom kit is supplied with a digital keypad. It incorporates two way speech, electronic call tone and lock release facility. The kit consists of speaker panel, keypad, surface housing, power supply and a handset.. Surface mounted panel. Modular system. Digital keypad entry (2 codes) 4-8 digits. Variable lock open time 0-99 seconds