Product name: Rotating countdown timerProduct model: F1Material: ABSProduct size: 85.2*25.6mmColor box size: 107mm*55mm*83.5mmProduct net weight: 66gWeight with packaging: 92gPower supply: 4.5V (3 AAA batteries, no batteries included in shipment)Maximum timing: 99 minutesDesign features: built-in bracket design, multi-angle adjustment, base magnetic suctionShipping standard: host*1, manual*1Operation instructions:Timing design: When the display is 00:00, press the button to start counting, and then short press the button to pause. After the timing is paused, press and hold the button to reset, and the display is: 00: 00.Countdown setting: 1. Turn the knob to set the required countdown time. Turn right to increase the value, and turn left to decrease the value. (When rotating quickly and the angle is greater than 60 degrees, the minute value can be quickly set, and the second value can be fine-tuned after an interval of 1 second).After setting, press the button to start the countdown. After the countdown is displayed as 00:00, there will be a "beep beep" prompt sound, and the screen will flash. When the countdown reaches 0000, a prompt sound of up to 1 minute will sound. Press the button to stop the prompt sound.3. During the countdown, short press the button to pause. After the countdown is paused, long press the button to reset and display 00: 00.Color: black/white (random)Package content: 1*random color