<b>Acetech is founded by former Xcortech team members to build better airsoft related electronics</b> <br><br> Support Micro-USB (5V/0.5A) power input (no battery charge function) or Use AA alkaline battery*2<br> Measures Muzzle Velocity from 30 m/s ~ 400 m/s (90 ft/s ~ 1200 ft/s)<br> Ammo parameter setting supports 5 memory slots<br> Ammo parameter setting from Weight: 0.01g ~ 9.99g Caliber 4.5mm ~ 18mm 25 memory slots for velocity and ROF (Rate of fire)<br> Idling and low battery auto power off function.<br> FCC, CE, RoHS compliant<br> Tripod Ready mounting hole (Screw for standard camera / camcorder tripods )<br> Support Micro-USB(5V/0.5A) power input(no battery charge function)<br> ROF range: 100~5000RPM<br> Extra large caliber (diameter 24mm)<br> Weight: 200g without battery<br> Size : L x W x H = 117 x 97 x 59 (mm)<br> <br> <br> <b>Q&A</b> <br><br> <b>Q1:Why my AC5000 is inaccurate?</b><br> A1: Factors do affect speed testing<br> Battery: 1. low voltage, 2. Please use alkaline battery instead of carbon zinc battery<br> CO2 smoke: In case of too much smoke causing the inaccuracy, please stay your muzzle 10cm away from the shooting hole of chrono when use CO2 airsoft gun shooting<br> Over measures range: AC5000 measures muzzle velocity from 30 m/s ~ 400 m/s (90 ft/s ~ 1200 ft/s)<br><br> <b>Q2: Why my screen shows ADC Error 2?</b><br> A2: Please insert USB power, then long press power botton for 5 seconds to turn on AC5000.<br> Please follow the instruction shows on LCD.<br> The condition of "ADC Error 2" would be solved.<br><br> <b>Q3: Why my AC5000 can't show ROF (Rate of fire)? </b><br> A3: Shooting over 10 shots continuously is required, when you do the ROF test.<br>