FEATURES OF SHOT TIMER<br> <br> Size: 94*69*44mm<br> Weight: 3.4 ounces<br> 4 Mode: firearms, airsoft, stop watch,Countdown <br> 4 Time Level: delay, instant, random, fixed, customized mode<br> IPV4 Waterproof: against splashing water<br> <br> ADJUSTABLE SENSITIVITY LEVELS<br> <br> Sensitivity level is compatible with ammo caliber reference. <br> Level 1 is lowest; Level 8 is highest. <br> Level 2: 12.7mm<br> Level 4: 7.62mm<br> Level 5: 5.56mm<br> Level 6: 9mm/.38/.45<br> Level 7: .22<br> Level 8: Airsoft practice<br> <br> When you use airsoft for training, you need to set to Firearms Mode and set the sensitivity to level 8. You could also set the timer to the Airsoft Modes. <br> <br> Your satisfaction is our main objective, if you have any problem or question with our shot timer, please feel free to contact with us.