Contact us: The fitness timer requires 5V DC or 6V DC power supply. The product package includes a 100-240VAC input 6VDC output power adapter, as well as a ring bracket and bracket for installation. It is equipped with a remote controller. The battery of the remote controller is 2xAAA (excluding the battery). This timer can only be controlled by the remote controller or control button. Please keep the properties of the remote controller. If it is lost, Please contact us: your account>click "Your Order">Find Order ID>click "Contact Seller". Brightness and buzzer: The fitness timer is a 1.5-inch high ultra-bright all-blue LED screen. The shell is made of aluminum alloy, which is very light and durable. The size is 11 (w) x 3.55 (h) x 1.4 (d). The bright 1.5-inch LED high-definition digital camera can be seen from dozens of feet away. Digital brightness can be adjusted at 5 levels. The buzzer prompts to start setting or end the device sound. 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. 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. Interval timer: upgraded multi-function timer, supporting 12-hour and 24-hour real-time clock, countdown, timing, stopwatch, custom interval mode, and equipped with stopwatch switch button. The external button power cord is extended to 98 inches (250CM), suitable for more scenarios.Date First Available: December 18, 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. : B0BQG38B18. Manufacturer: Smaheat. Item Weight: 1.87 pounds. Human Interface Input: Buttons. Number of settings: 5. Item Weight: 1.87 Pounds. Product Dimensions: 1.41"D x 11.02"W x 3.54"H. Material: Aluminum. Brand: SMAHEAT. Color: 1.5 Inch Six-bit All-blue.