contact us:Fitness timer requires of 5V DC or 6V DC power supply, The product package includes a 100-240VAC input 6VDC output power adapter, and ring stand and bracket for mounting, comes with 1 remote control, remote control battery is 2xAAA (battery not included )), this timer can only be controlled by the remote control or the control buttons, please to keep the remote control Property, if lost, please contact us: your account > click "your order" > find the order ID > click "contact seller". Brightness adjustment and buzzer:The fitness timer is a 1.5-inch high-character super-bright LED screen. The shell is made of aluminum alloy, which is very light and durable. The size is 11(w)x3.55(h)x1.4(d). You can see the bright 1.5" LED HD digital from dozens of feet away, the digital brightness can be adjusted on 5 levels, the buzzer reminds you to start setting or ending the device sound, of course, you can turn it off by the remote control, really help you exercise. Interval Timer Programming:The timer has timer programming function, saves up to 10 custom programs, P0-P10 in the interval clock, each with 9 custom intervals (from F1 MM: SS C1 MM: SS to F9 MM: SS C9 MM: SS), can support up to 99 rounds, easily set the time, interval, times, rest time through the remote control button, remember the corresponding numbers and programs, enter the recovery training with one key, and facilitate group training. Timing settings:Timer/countdown up to 99:59:59, stopwatch up to 99:59:59, start/end via remote control, fully wired switch button: The time first press the button is pressed to start running, The second time press the button stop Run, press the button a third time to continue. Button Press and hold for 3 seconds to reset to the preset time. fitness timer:This is a multifunctional fitness timer that supports a 12-hour, 24-hour real-time clock, countdown, positive timing, stopwatch, and customized interval mode, and has a stopwatch switch button to meet all your training needs in different venues, of course, Can also be applied to your daily life.Date First Available: April 22, 2022. Best Sellers Rank: #59,953 in Sports & Outdoors. Customer Reviews: 3.9 out of 5 stars 25 ratings 3.9 out of 5 stars. Item model number: 1.5 inch. Country of Origin: China. : B09YL2JNL5. Manufacturer: Smaheat. Item Weight: 1.92 pounds. Human Interface Input: Buttons. Number of settings: 5. Product Dimensions: 1.41"D x 11.02"W x 3.54"H. Material: Aluminum. Brand: SMAHEAT. Color: 1.5 Inch Six-digit All-red.