Quartz Cuckoo Clocks are operated by batteries, so you don't need to pull up the weights every day or every 8 days. The cuckoo calls on the hour.  The quartz cuckoo clocks come with chains and weights, and they have volume control.  All our cuckoo clocks are made individually, so each clock will be slightly different from the pictures.  All clock dimensions are approximate.  Weights and pendulums are sometimes not shown in pictures but are included with all clocks. All our cuckoo clocks are made from wood in German Black Forest.