[Great Time Management Tool]: 3D-printed hourglass with LED lights and 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 [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 of futuristic charm to any space, blending the classic function of an hourglass with cutting-.This made our life much easier. [User-Friendly Controls Widely Use]: Simple one-touch operation with intuitive controls for easy time management for classroom use, , tooth brushing, child learning, self- control, psychological training and cooking Operating Instructions 1: 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 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 . Operating Instructions 2: After power on, the hourglass enters the standby interface, the "Model" button to enter the time setting interface. In the time setting interface, "+" or "-" button. The screen display 0-30, indicating that the timer's timing period is set to 1-30 minutes. After selecting the desired time, the "model" key to the timer. Specification: yellow light source Voltage: 5V Current: 0.2A Battery Capacity: 450mAh Standby Time: 5 hours Dimensions: 97 x 55 x 20.5mm Color: Black Material: plastic Package Contents: 1 x LED Night Lights 1 x USB Cables Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.