Current controlled biphasic waveform 1J to 300J in 19 steps More than 100 shocks at 300 joules from a new fully charged battery Charge to 00J in 8 seconds or to 200J in 5 seconds from mains or battery Quick energy selection via rotary witch Suitable for adult & paediatric applications 6.5” colour LED display 3L/5L ECG support 48 mm thermal line printer