Brief introduction: Can countdown 99 minutes 99 seconds, sound/red light double warning! Widely applicable to all kinds of need timing, timing places! Functional description: 1. Countdown function: 99 minutes and 59 seconds can be counted down, and the countdown time can be set automatically after the completion of the countdown; 2. Positive timing function: the positive timing time is 99 minutes and 99 seconds; 3. When the countdown reaches zero, there will be a "BB" sound prompt with a gradual change of 60 seconds and a light will shine, and the original setting state will be returned; Product attributes: 1. Window size (LCD) : 54*24mm 2. External size :80*70mm Weight: 83 grams 4. There are magnets, supports and spare hanging holes on the back; Can be adsorbed on a metal surface or placed on a table, or suspended; 5. Use two batteries of AAA7.