1. 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. 2. Last 30 Hours: The interval timer can last up to 30 hours on a single . Give you plenty of time to use and comfortable use process. 1000mAh battery. 3. Low Battery Reminder Function: The workout timer adopts the low battery reminder function, so you 't notice the battery is low during your workout. 4. 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. 5. Wide Use Scenarios: The workout timer can be widely used for home gyms, home garages, schools, and so on. Item Type:Timer Battery:Battery Capacity 1000mAh(shipped with built in battery) Colour:Black Material:ABS Size:15x4x2.5cm Package Contents: 1 x Timer 1 x USB Cable Only the above package content, other products are not included. Note: Light reflection 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.