1. Super Standby Time: Universal USB rechargeable, maximum standby time can reach up to 500 hours when fully charged. 2. Easy Operation: Small LCD with backlight displays unlock time clearly and softly; 3 small buttons allow easy setting of hours or minutes. 3. Metal Body: Lock body constructed from metal with sharp edges and enhanced textured surfaces for improved durability and security. 4. 99-Hour Timer: Unlock time can be freely set up to 99 hours and 59 minutes. Once timing is complete, the lock ring opens automatically. 5. Improved Sleep Quality: Helps reduce screen time before bed, encouraging earlier sleep and better sleep quality. Control Smoking: Assists in limiting smoking frequency, reducing daily cigarette count, and gradually increasing intervals between cigarettes to support healthier habits. Product Name: Metal Timer Lock Battery: 3.7V/200mAh Battery (included) Standby Time: More than 500 hours Size: 45 x 78 x 18mm / 1.77 x 3.07 x 0.7 inch Lock Type: Keyed Padlock Color: Black Material: ABS and metal Package Contents: 1 x Time Lock Note: Light reflection and differences in display screens may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.