*Powered by rechargeable battery.Fixed codes.*Sleepding and awakong power-saving.*Intelligent battery protection at low voltage.*Intelligent battery protection at low voltage.*Range:200-250m.*Wit key switch safeguard and time clock. *Output signal indicator.*With"Single","All","Step","Sequencer"and "Pause"firing functions.*By using our professional radio control desk-KFE2209/1,it can control at least 12pieces of receivers independently,It is specially designed for making big shows.