every hour, one of 12 native birds sings their melody original field recordings by Jean-Claude Roche (France) hand painted illustrations by K. Mullarney (Ireland) and D. Zetterstöm (Sweden) brochure with biological details "where and how they live" quartz movement, light sensor size 1.97x13.39x13.39, weight 1.68 lb (1.98 lb for wooden ring variant) batteries: 3 x AA (not included) Made in Germany