MG712C is 2 in 1 electric salt and pepper grinder. Needs a 6pcs AA battery for power. If you want to grind pepper, you could press the “P” button and the “salt ” button for salt. It could contain 20g pepper and 45g salt at the same time. We use the ceramic burr for the grinder. We are professional kitchenware with CE, FDA, LFGB certification, could promise you food safety.