Tower crane wireless anti-collision system
R&D and production by AST SG, this system is base on the presupposition of proficiency and practicality to design this tools. Since 2006, AST HK sold over 100 unit of wireless anti-collision system. AST SG have over 40% market shared by this system.

Advantage:
	Applicable most of brand and model tower crane
	Same time display the actual situation and parameter
	Economy in price and durability
	Easy to handle and installation
	Technicians easy to setting and calibration