The maximum time interval is 99 minutes and 59 seconds. It is most suitable for kitchen cooking classes, children's classes, teacher classes, barbecue classes, physical education classes, etc. This timer does not include AAA batteries.With magnet on the back, it can be adsorbed For people who do not have the best vision, large numbers and large LCD screens are perfect. The simple and easy-to-use button design allows children to use it without thinking. The shell is made of metal material, strong and durable, and has a long service life. specification: Status: Weight: 80 grams Power supply: 1 * AAA (not included) Colour: black + silver Material: metal + electronic components Size: 6.5 x 7 x 1.7 cm Package Contents: 1 x Timer Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.