99 minutes and 59 seconds timing and countdown timing functions The volume can be adjusted in three levels and the brightness can be adjusted in three levels Built-in 600mAh rechargeable battery for easy charging and use Mirror surface design, high-end and fashionable appearance Three placement methods: magnetic adsorption, desktop bracket, and hanging by hook Instructions: Press the MINUTE key to set the length of "minutes" Press the SECOND key to set the length of "seconds" Press the START/STOP button to start or stop the countdown Press the CLEAR button to return the number to 0 and reset the time When the set time ends and reaches 0, the alarm sound of "Didi, Didi..." will sound continuously to remind you that the set time has arrived Press the MINUTE or SECOND or CLEAR key to end the alarm sound and return the time to 0; press START/STOP to end the alarm sound and return to the initial set time The red light turns on when charging Specification:  Model: FY501 Material: ABS Product size: 150*70*36mm Product net weight: 135g Battery capacity: 600mAh