Battle Airsoft Spain share what they think about the Acetech Brighter R tracer unit... "Today we bring you from Harrods the review of this tracer of the Acetech brand. This Tracer is the Brighter -R model and incorporates the novelty of being able to use red and green balls despite its small size. It has "shaking" technology, it does not have buttons to turn it on or off, so to turn it on you just have to shake it and to turn it off you have to insert something covering the led inside (it will beep 5 times and it will turn off)."