Power saving mode, automatic sleep screen without and timer/countdown , 5-second white movement reduces screen brightness Three adjustable volume levels (mute flash screen, mute device, loud device) Suitable for home school supplies learning tools, office and meeting timer, quiet operation. The timer is the perfect timekeeper for classrooms or kitchen cooking, promoting the completion of designated tasks. Say goodbye to procrastination, low motivation, gaming addiction, ineffective study and work, and lack of planning.