Hybrid singmode multimode multi - channel FORJ max speed 1000RPM moog rotary joint slipring connector Using light signal transmission, no electromagnetic leakage. Good sealing. Resistance to electromagnetic interference No contact transmission, no wear and tear. Long life, can be up to 10 million RPM. No friction, can be used in inflammable and explosive environment. Can be used in extreme natural environment. High magnetic current interference, also can work normally.