Visual Timer: Large color dial, clearly see the time on the interface. Time away and can be seen. It is also very easy to understand for younger children. Simple to Operate: turn the knob to start the countdown. Two reminder modes: 1. Vibration + flashing light reminder 2. Ringing bell + flashing light reminder; Provide optional alarm function for sound sensitive environment, avoid disturbing others. After the countdown over, press the top button to turn off the ringtone or vibration. Cycle timing: press the top button to enter cycle timing, no need to operate the knob, 25 minutes of work/study, 5 minutes of rest, automatic cycle. Back Bracket: the bracket can be adjusted in two positions, free to adjust the comfortable viewing angle. Specification: Battery capacity: 250mAh Size Chart: 8.5cmx3.3cmx10cm/3.35inchx1.30inchx3.94inch Package Includes: 1Visual Timer Note: Please allow slightly errors due to manual measurement and different monitors.