Mute mechanism: no ticking, quietly sweeping the second hand to ensure a good sleeping and working environment. Perfect clock, suitable for hanging outdoors or indoors, dining room, living room, family room, bedroom, study room, kitchen, office or conference room, simulating double temperature environment. Elegant design: Retro frame, bright frame, dial and big black numbers provide a good view. Easy to use: Battery-powered, only one AA zinc-carbon battery (not included) (alkaline battery or rechargeable battery may affect the life of clock movement and the accuracy of time). There is a wide slot on the back for easy hanging. Waterproof and easy to clean: Waterproof back cover and front rubber seal, suitable for indoor or outdoor daily use. Strong plastic frame and flat glass lens, easy to clean, keep dust away from the dial.