"How to turn off the sound: Just press and hold the button [+/-] until the counter beeps, release your hand immediately and it will be silent. If you want the counter to beep again, follow the same steps again.Easy to use: Press and hold the top button for three seconds to turn it on, press and hold the top button to return to zero after counting, and press and hold it for three seconds again to turn it off. It has been measured to count 5 times per second.4-digit LCD display with addition and subtraction counters up to 9999 (no negative numbers); both come with a lanyard for easy carrying, and can even be tied to a golf bag.The SDARMING counter is compact and can be easily used with one hand. The shell is made of high-quality ABS material, which is more durable and the buttons are more sensitive.Wide range of applications: This counter can be used in various applications where you need to count. For example: docks, bus stations, schools, laboratories, gyms, competition venues and other public places. It can also be used to record golf scores, restaurant counting, knitting, inventory and everything else you need to count, allowing you to say goodbye to boring counting."