The T4300A represents the next step in transmitter technology. New key pad overlay with built in LED's offer a longer life and better water resistance than regular push buttons. Operates two R4300 receivers to give singles, report or true pairs. Includes 2 receivers. By using the 127 available field/channel settings the R4300 can be used on adjacent stations with no interference.With no ON/OFF switch, the T4300 has instant "ON" and transmit, saving battery power. The T4300A operates on a single 9 volt battery and has an operating distance in excess of 400 yards.