Product material: ABS+PS > Rated power: <1W > Battery input: DC5V 500mA > Power supply mode: USB power supply / 3 AA batteries > Product size: 80×80×27MM (round) > Timely and long-term countdown reminder: 1-59 minutes countdown function, 3-minute chord reminder in time, to avoid forgetting to keep food in the oven, microwave oven for a few days or forgetting to turn off the fire. > Screen wake-up automatic screensaver: You can activate the screen display by voice control, tapping, shaking, etc. When a sound is detected, the screen will light up, and the display will automatically turn off after 35 seconds. > Two sets of alarm settings: 2 sets of alarms (R1 and R2) can be set every day, such as setting reading and sleeping reminder alarms, and reminders on time do not need to be set repeatedly. > Long light/energy-saving mode switching: When powered by an external USB power supply, the DP mode corresponding to the display panel will continue to light up continuously; in the case of only dry battery power supply, when there is sound around the product, the display panel will light up for 35 seconds and then automatically turn off. >