Dac targetize target system mounts on rail of handgun< FEATURES: -Smart, lightweight, multi array motion sensor, mounted onto the rail of a pistol-Helps a shooter track, control & improve muzzle movement management-Provides realtime feedback, guidance, improvement tips & tracks progress over time Other Features: Bluetooth technology rechargeable 6 hr run time 9 axis motion sensors track muzzle movement/provides real time feedback to phone tracks accuracy grouping corrective feedback each shot tracks muzzle movement control do not need a target/grouping is tracked on phone