Bluelab PENGTB Growers Toolbox Toolbox includes; Bluelab pH Pen and Bluelab ppm Pen With bonus: Bluelab Grow Book and pH and Conductivity Probe care kit Probe Care Kit contains; 2 of each single use sachets for pH7.0, pH4.0, EC2.77 and KCl Storage solution Probe cleaners and cleaning tools and well as plastic cups and instructions Refer User guide given below for trouble shooting steps page - 7