Features Made of ABS Material: This gym fitness timer is made of ABS material and small and portable. You can take this timer anywhere and start training. Last 30 Hours: The interval timer can last up to 30 hours on a single charge. Give you plenty of time to use and comfortable use process. 1000mAh large battery. Multifunctional: Gym timer is including 10 functions, such as clock display, 3 groups of custom for interval timer, count up by round, countdown by round, stopwatch, alarm clock, 10 seconds countdown, beep buzzer control. Low Battery Reminder Function: The workout timer adopts the low battery reminder function, so you won't notice the battery is low during your workout. Wide Use Scenarios: The workout timer can be widely used for home gyms, home garages, schools, gardens and so on. Specification: Item Type: Timer Material: ABS Battery: Polymers Battery x 1, Battery Capacity 1000mAh(shipped with built in battery) Package List: 1 x Timer 1 x USB Cable Package List 1 x Timer 1 x USB Cable