Our team members are experienced in airsoft related electronics such as chronograph, auto target, airsoft gun controlling system, and bullet tracer. Features: Acetech APP is designed to provide users a better product experience. Acetech products can connect with Acetech APP. Speed Testing By bluetooth connection, Acetech tracer can be used as chronograph to test airsoft speed. Speed is dectected automatically and tallied in real-time. Data Record Histroy data record can be saved on Acetech A