product properties: Alarm clock function: Five alarm clocks can be set. (For example: you can set 02:00, 05:00, 12:00, 18:00 to 20:00, 5 different alarm clocks to remind you.) Clock function: 12-hour or 24-hour clock (you can choose 12-hour or 24-hour). Timer function: Countdown to a maximum count of 23 hours and 59 minutes. Uses 1 AAA battery (battery not included in product) Back Stand: Allows this timer to stand on a table. Product size: 80*56*22mm Product weight: 52 grams (bare metal) Five groups of timing function applications: You can set 1-5 groups of timings within 24 hours. The shortest interval is 1 minute. Once set, it can be used every day. Each group of timings has a 60-second sound reminder; press any key during the timing and the sound will stop, but when the setting is reached The second timer will continue to sound; Examples of timing function applications: For example, if you want to get up at 7 a.m., set the first time to 6:50, the second time to 6:53 (the interval between each time can be set at will, in minutes), and the third time to 6:53. The first timer time is 6:56, the fourth timer time is 6:58, and the fifth timer time is set to 7 o'clock. Each timer time is 60 seconds. When the alarm sounds, you press any key and the alarm stops. The alarm will continue to sound when the next alarm time comes.