This is a 1-pad hardwired pad-box with 1x 30-foot-long igniter lead. Reads good/bad continuity at the pad, as well as voltage of the battery at the pad with built in piezo buzzer. Continuity check is safe for ALL known commercial igniters including flashbulbs. When the pad is armed a warning light is lit on the top of the pad-box and the piezo buzzer also screams its warning to everyone nearby. This unit may be made wireless with the addition of a WRU-c unit.