Calculator Watch Black

8-Digit calculator and watch in one. Black silicone strap with buckle closure. Digital display. Constants for addition subtraction multiplication and division. Dual time and Daily alarm. 1/1000 Second stopwatch. Hourly time signal. Auto calendar. Accuracy +/- 15 seconds per month. Approximate battery life up to 5 years. Case size: 42 x 33 x 7mm.