Large radio clock 50x50 cm with battery operation. Radio clock DCF77 operates on 2x 1.5 V batteries and is designed for indoor use. It weighs approximately 4.8 kg and has dimensions of 50x50x10 cm. The housing is made of very sturdy aluminum, painted white (RAL 9016), and features a front glass made of Plexiglas XT. An optional ball-proof design is available with 2-pane laminated safety glass.

The dial features a very clear metal design with a print diameter of 42 cm, ensuring readability from a greater distance, approximately 30 m in illuminated rooms. The clock is painted white with black Arabic numerals or black DIN bars, in accordance with DIN 41 091. The pointer displays hours and minutes in black, with an optional ball impact resistant version.

This clock is suitable for use in gymnasiums and sports halls, featuring a robust housing with a lever-out safe 3-point fixing and 6 mm 2-pane laminated safety glass. It is constructed according to DIN 18 032, Part 3, with an optional damp room version. The encapsulated clock movement has a protection class of IP 54 EN 60 529, providing complete protection against contact, dust deposits inside, and splash water from any angle. It is moisture and dust protected and intended for indoor use only.

The radio clock DCF77 is synchronized by the time signal transmitter DCF77 in Mainflingen, ensuring the time is always correct to the second. The time setting and summer-winter time changeover are fully automatic. Due to its battery operation, this large-area wall clock can be operated independently of the mains.