*Powered by rechargeable Lithium battery.*Sleeping and awaking power-saving.*Intelligent battery protection at low votage.*Range:*Intelligent battery protection at low votage.*Range,200-250m .*With ON/OFFswitch safeguard.*Auto-testing.*Output power:24v.*Output power indicator.*With"Single"All",Step",Sequencer"and input & output trigger firing function.*By using our professional radio control desk-KFE2209/18,it can control at least 12pieces of receivers independently.It can be used foe big shows.