USB rechargeable timer lock with a builtin lithium battery. It can run up to 120 hours on a full charge and recharges via USB. Simple controls: three small buttons to set hours or minutes; maximum programmable duration is 99 hours and 59 minutes. Secure operation: when the lock is engaged, it remains closed and cannot be opened by force; tamper resistance is part of the design. Set the time within the recommended range. Clear, straightforward usage: intuitive setup without complicated steps; designed for reliable timing performance. Practical applications: Use in offices or homes to restrict access to cabinets, lockers, or storage boxes for a defined time window. Manage temporary access to shared tools or equipment in classrooms, workshops, or labs by presetting a lock duration. Enforce timed access to valuables or items in a home safe or locker. Key specifications at a glance: Charging: USB charging for the builtin lithium battery Battery life: up to 120 hours per charge Duration setting: up to 99 hours 59 minutes Control: 3 small buttons for hours or minutes Security: locked state remains secure and resistant to forced opening Note: Set the time reasonably within the 0:00 to 99:59 range to ensure proper operation.