6+n technology door phone for universal replacement and expansion needs for almost all existing Siedle systems in 6+n or wire-saving 521 technology with door speaker types TLM 511/611, TLM/TK 511, TLM 521, TLE 051, as well as predecessors. The HTA 711-01 can be used as a direct replacement for the door phones HT 611-01, HT 511-01, HT 401a-01, HT 401-02, HT 411-02, HT 311-0, HT 351-0, HT 111-02, LN 7150, LN 7145 without any additional accessories or modifications.

Auxiliary signaling device with electronic three-tone gong, alpha tone, and continuous tone. Discreet flat design for surface mounting. Volume adjustable from the outside, approximately 86 dB(A). Operates in 12 V doorbell systems.

Operating voltage: 12 V AC, 16-20 V DC. Operating current: max. 200 mA. Dimensions W x H x D: 107 x 107 x 25 mm. Color: white. Functional signaling. Installation technology: multi-wire system. Material: plastic. Mounting type: surface-mounted. Width: 107 mm, Height: 107 mm, Depth: 25 mm.