The hit impact indicator means never guessing again.Attach it to a target stand and it easily distinguishes impacts by blinking h-i-t in morse code.Being on target is six dots and a dash away.Ultra-bright light indicates bullet impact on distant steel targets, visible up to 1000+ yards with naked eye.Easily attaches to most stands with included elastic band.The indicator is rechargeable using micro-usb, morse code "h-i-t" blinks for impact distinction, the accelerometer detects bullet vibrations for activation.