<b>Founction</b><br>★ DELAY setting including Instant, Random, Fixed (Default 3s) and Customized (1-10s). <br><br>★ PAR setting including Time (1-120s) and Cycle (1-10 times).<br><br>★ MODE setting including Fire, Airsoft, Stop Watch, Countdown. <br> ♥ Fire contain "Filter"(1-12) and "Sensitivity" (1-8 levels) setting. <br> ♥ Countdown contain "Min"(0-10 minutes) and "Sec" (0-60s) setting. Timer will make a sound of "beep" in starting and ending.<br><br>★ SYSTEM setting including Langues, Eco-mode and RFID. <br> ♥ Eco-mode contain Normal and Customized (1-60 minutes). You can set the timer to power off automatically after a certain time no-operation to save battery life. All shooting data will be automatically cleared after turn off, all the settings will remain unchanged.<br><br><b>Firearms Practice</b><br>The sensitivity level is compatible with ammo caliber reference Sensitivity 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><br><b>Airsoft Practice</b><br> You need to set to “Fire” Mode and sensitivity level 8. <br><br><b>Volume and Sensitivity setting</b><br> In the non-timed state, long press the "lock" button, touch the "volume" button to adjust the volume (1-3 levels), touch the "+" or "-" button to adjust the sensitivity (1-8 levels).<br><br><b>How to review shooting records?</b><br>In the non-timed state, long press "volume" to view the last shooting data, tap "review" to view all shooting data of current group, tap "start" to view every group; Long press "volume" again to choose whether delete all datas, return to the main screen.