High pressure oval gear grease meter with digital display, 1/8" inlet / outlet connection. Works with up to NLGI-2 grease. Shock proof, Clear to read, Increased durability, Easy to replace batteries and calibration function. Aluminium body, Acetal oval gear technology and Strengthened PC cover. Works with two 1,5 V AAA alkaline batteries. Youtube video: https://youtu.be/wBkymrU0Wv8 Instruction book: 841810.