Package contains 2 of AAA batteries. Separating study time from break time will increase your concentration and motivation! Large Button Study Timer With Interval Mode Pebble Digital Pomodoro Timer - Kitchen Timer For Cooking Kitchen Cooking Timer You can set up to 199 minutes 59 seconds, and counts 1 100th of a second. dretec Learning Timer, for Studying, Large Button, Qatar | Ubuy Volume has 3 selections, HIGH / LOW / SILENT. 🔳《EASY TO PUSH THE START / END BUTTONS》 This item is used for many ways to set time, such as exercising, cooking, study, gaming or playing for children. 🔳《PRODUCT DETAILS》 Maximum setting time: 199 minutes 59 seconds., Size: 2., 4(60mm) X 3., 1(80mm) X 0., 9(23mm)., Weight:2 oz. 🔳《MUTE & LOCK FUNCTION》 Easy to activate the lock to prevent any errors or unexpected operations especially when carrying the timer in your pocket or bag. This timer has a repeat function. dretec Interval Timer Stopwatch | Count-Down & Count-up 🔳《ENHANCED 3 FUNCTIONS》 It has three functions; Interval mode/Timer mode/Clock mode. Interval timer with four timer settings Of course, you can create efficient learning plans, as well as a study run routine. You can measure 4 different times, so you can also use it for studying breaks, training, and hobbies Silent mode is useful in quiet environments.