This units can be used in any electromechanical system that requires unrestrained,continuous rotation while transferring power or data from a stationary to a rotating structure.It's also called a rotary electrical interface,commutator,collector,swivel or an electrical rotary joint.It can improve electromechanical capability,simplify system design,eliminate possible damage while rotation.It’s the key apparatus of various precision rotary worktable, electric test instrument,manufacture and process control instrument. Features: ■ 2 amps ,240 VDC / 240 VAC per circuit ■ Precision ball bearings meet or exceed life requirements for most commercial application ■ 6 circuits models ■ Gold-on-gold contacts ■ 200mm standard lead lengths ■ Compatible with data bus protocols ■ Speeds up to 300 rpm continuous ■ Sealed units are also available ■ Flexible, color-coded, silver-plated, Teflon insulated lead wires ■ Transfers analog and digital signals ■ Also available with 5 and 10 amps power rings combined with 2 amps rings. http://www.chinaslipring.com