The MAULmove 40RC clock incl. battery is ideal for modern office spaces, reception areas and anyone who appreciates a stylish wall piece. A keyhole slot on the back allows for secure wall mounting. - Easy to read from up to 50 m away thanks to 5.5 cm numerals - Battery operation, includes 1 x 1.5 V (AA) battery - Numeral height of 3.5 cm (30.5 cm diameter), or 4.4 cm (40 cm diameter) - Pleasantly quiet - Automatic synchronisation with DCF77 signal, automatic adjustment of summer/winter time Signal interference due to geological situations or metal constructions in buildings is possible. Signal range approx. 1500 km from the transmitter location. Manual adjustment is also possible.