What this study timer offers is a lanyard hole on the back, allowing it to be attached to a lanyard and placed wherever it is easily visible. This study timer rings loudly to alert you when it's time to study or when food is ready, helping you stay organized. It is made of ABS and LED materials, designed for durable, long-term use. The product dimensions are 4.3 cm in length, 4.3 cm in width, and 1.5 cm in height. This timer is suitable for use at home, in dorms, study areas, and other household settings.Item Name: Timer Material: ABS, LED Battery: 1 x LR44 Battery (Included) Features: Time Management, Simple Operation, Loud Alert Size Details: 4.3 cm x 4.3 cm x 1.5 cm / 1.69" x 1.69" x 0.59" (Approx.)Notes: Due to differences in lighting and screen settings, the item's color may vary slightly from the images. Slight dimensional variations may occur due to manual measurement.Package Includes: 1 x Timer