Features: Universals usb rechargeable, standby time exceeds 500 hours, a charging can last for 30 days, not worry about none power at any time. Small LCD with backlight, display the unlock time soft and clear, 3 small buttons to set hours or minutes, easy to use. The Lock body is make of metal, Sharply edges and smooth surfaces, enhances textured metal lock. Freely setting of unlocking time, up to 99 hours and 59 miunutes.after the timing is finished, the lock rings will open automatically. When the countdown to time is 0, it will emit an alarm to remind you whether to reset. Suitable for: Reduce the time of looking at mobile phones, fall asleep early, improves sleep quality, and live a healthy life, Control smoked: reduce the number of cigarettes per day, gradually extend the interval, and cultivate healthy habits. Very suitable for correcting delayed patients who lack control ability. Specifications: Component: zincs Alloy Color: Silver White/Silver Black Size: about 46x18x43mm/1.81x0.71x1.69inch Package Includes: 1pc Timer Padlock note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.