★ 99 HOURS TIME RELEASE ★ – Only lock when you setting the time and start it. After time run out it will unlock automatically. The maximum time is 99 hours and 59 minutes. Lock has a small monitor and 3 button, which can be increased by hours and minutes
★ DURABLE ★- Bear the pull 280 lb. from horizontal or vertical, 3 grades resistance falling. it will not open, It is impossible to destroy by hand, please set the time reasonably
★ ALARMING ★ – When the time counts down to zero the lock will alarming