Our quartz cuckoo clocks are battery operated and require 3 "C" cell batteries, they will operate the clock for 8-12 months. The 2 pine cone weights are for looks only and do not move down as they do on our 1 & 8 day mechanical cuckoo clocks. The pendulum will swing side to side but it is the quartz crystal that regulates the clock within 1 minute a month accuracy. The hourly cuckoo call is an actual recording of a real cuckoo bird and another cuckoo returning the call,