BFT-510WS Indoor station audio standard surface-mounted 2D video in white. Audio indoor station for intercom systems in accordance with DIN EN 50486 in 2-wire video technology. Indoor station for hands-free speaking without receiver for wall mounting with touch sensor buttons and symbol displays as well as cleaning mode. Function buttons with LED: Speak on/off, door opener, light and call cancelling. Full or half-duplex operation can be set. 16 harmonious ringing tones, free assignment of ringing tone melody to differentiate between door, storey or internal calls, electronic adjustment of ringing tone melody and button tone volume. Ring tone melody can be cancelled with LED control display and visual status display. Half-duplex intercom mode can be set temporarily and permanently. Call waiting function when the connection is active, with hold-off and automatic call switch-off after minutes. Special function: Internal call for internal calls to addresses FF and FE. Light button e.g. for stairwell or courtyard light. Connection for storey call bell button and storey call forwarding via the parallel indoor stations. Parallel connection of maximum indoor stations. Also suitable for mounting on appliance box in accordance with DIN 49073. Drehfix function: One-man commissioning by addressing with rotary coding switch.