Feature: 1. LED LARGE SCREEN DISPLAY: This classroom timer is equipped with a large LED screen display, which can be clearly read from any angle and improve classroom efficiency. 2. 2 TIMING MODES: Supports positive and countdown mode with memory function. When the countdown reaches 00:00, pressing any button on the top of the timer will return to the last set time. 3. VOLUME ADJUSTMENT: This classroom countdown timer supports high, low and mute volume adjustment function, which can be adjusted according to actual needs. 4. MULTIPLE USE METHOD: It can be fixed by hanging, bracket or magnetic suction, which is more convenient and flexible to use, adapting to different layout and use needs. 5. ENERGY SAVING AND POWER SAVING: You can choose the constant light mode or power saving mode to save energy. Meanwhile, the large button design is easy to press and operate, simple and easy to use. Specification: Item Type: Classroom Timer Material: ABS Product Size: Approx. 90x65x25mm / 3.5x2.6x1.0in Battery: 3xAAA Batteries (Excluded) Timing Range: 99 Minutes 59 Seconds Countdown, Positive Timing Volume Adjustment: High, Low, Mute. Package List: 1 x Classroom Timer 1 x Instruction Manual