[Great Time Management Tool]: Unique 3D-printed hourglass with LED lights and gravity sensor for a mesmerizing timing experience.allowing someone to forget time and enjoy time [Versatile Timing]: Adjustable timer allows you to set desired duration from 1-30 minute The digital hourglass sand timer give a visual aid to know how much time is left and kids know a time frame of how long they need to read, play, watch ect [Sleek Cyber Style with 8x8 Matrix Display]: Boasting a sleek, cyber-inspired design, this hourglass features an 8x8 LED matrix display. Its modern aesthetic adds a touch of futuristic charm to any space, blending the classic function of an hourglass with cutting-edge technology.This made our life much easier. [User-Friendly Controls Widely Use]: Simple one-touch operation with intuitive controls for easy time management.Ideal for classroom use, game time, tooth brushing, child learning, self- control, psychological training and cooking Operating Instructions 1: Press and hold the power button for 3 seconds to turn on/off. There are three buttons on the back of the Timer, '+', 'model', and '-'. The 'model' button is used to enter the time setting mode and start timing. The '+' and '-' buttons are used in the time setting mode to increase or decrease the timing, in minutes. During the Timer timing process, you can also adjust the brightness of the Timers. Operating Instructions 2: After power on, the hourglass enters the standby interface, press the "Model" button to enter the time setting interface. In the time setting interface, press "+" or "-" button. The screen will display 0-30, indicating that the timer's timing period is set to 1-30 minutes. After selecting the desired time, press the "model" key to start the timer. Specification: yellow light source Voltage: 5V Current: 0.2A Battery Capacity: 450mA