Easy to Use: This cube timer comes with 11+1 sides common time module, simply flip it to the desired time, the side you need to countdown the screen facing up to start, please refer to the instruction manual for the specific use details 11 Preset Times: The time management tool has 11 preset countdown times (1/3/5/10/15/20/25/25/30/45/60/90 minutes) USB Charging: This flip timer can be charged by USB charging cable. When the indicator light turns red, it means the timer's power is less than 10%, you need to charge it as soon as possible, and the green light will be lighted when it is fully charged Multiple Modes Setting Alert: This productivity timer has 3 alarm reminding modes: ring, vibrate, mute, short press on the indicator light can be switched. Silent decibel timekeeping, will not be disturbed during the timekeeping period Stylish and Portable: This cube timer is small and portable, you can take it with you everywhere. The spherical curved design is very fashionable, can be put in the classroom, kitchen, office, study room, add stylish feeling to your space while managing your time accurately