for up to 16 residential units, surface-mounted installation, product depth 20 mm, metal housing made of robust aluminum profiles, metal bell buttons with gold-plated, maintenance-free contacts, 2 indoor stations can be assigned to each bell button, long-lasting and energy-saving nameplate lighting, shatter-proof nameplate glass, acknowledgement tone when the bell button is pressed, PES function adjustable with configo configuration software (except bell button programming), talk time ex works: 56 seconds / adjustable with service device, any bell button can be used to switch on the light, volume and microphone sensitivity can be adjusted manually, plug-in memory for exchanging identical outdoor stations, R terminal for connecting a function extension - door opening, door opening time on R terminal ex works: 3 seconds / adjustable with service device, door standby time (to control short-term storage in indoor stations) ex works: 56 seconds / adjustable with service device, speech connection during door standby time / adjustable with service device, material / colors: natural anodized aluminum (EN), protection class IP44, input current (3-wire technology) I(a) = 0.6 mA, I(P) = 20 mA, maximum input current I(Pmax) = 80 mA, dimensions: H 318 mm x W 135 mm x D 20 mm, permissible ambient temperature -25 degrees C to +55 degrees C, code lock properties, 10 access codes (max. 8-digit) with individual trigger functions, sending of TCS protocols door opener, control function, a master code (max. 8-digit) for maintenance and configuration, manual programming, acceptance of leading zeros in access codes, entry of access code without completion by pressing the # key, sending light switching protocol when pressing the # key, LED for status display, optical and acoustic acknowledgement when entering code, optical and acoustic error signaling, acoustic key acknowledgement, switching input, two-pole plug-in screw terminal for external potential-free contact, the switching input is configurable and influences the effectiveness of the code in memory location no. 1 (code deactivation or postman function), extension socket for connecting the bell button extension or the service device, material, color of keypad area: natural anodized aluminum, height of code lock 76mm