I have had this unique hygrometer, thermometer and clock in my cupboard for about 20 years and never used it. It is operated by a single battery. I have included the battery for reference purposes only. It might well be empty by now. 

The cube weighs 225 grams and its dimensions are 45 mm x 45 mm x 45 mm.

Any questions, please ask. 

It can be posted to any country in the European Union and the postage will depend on the specific country.