Robotime-ROKR mechanical clock with a beautiful owl shape and battery movement. It has a wind-up pendulum with a wind-up timer. When the time is up, the timer bell will ring! Cool project with absorbing building experience, also a beautiful home decor after finished. Best gift kits and hobby for holidays and quality time. Battery clock: a real clock driven by accurate quartz battery movement. Bell timer: a timer driven by spring and will ring when time is up (max: 30mins). Real peudulum: a spring-driven pendulum with precise anchor escapement. Elegant outlook: appealing owl shape and beautiful roman numerals dial. It will be a delight to eyes as a home decor. Perfect gift: gift for mechanical lovers or family & friends at any occasions like birthday, father's day or chirstmas. The fun of kits building & brain teasing of mechanical engineering