MM) Depth (mm): 160 Height (mm): 40 Power supply: 2 x AA alkaline batteries (Ni-MH rechargeable batteries can be used, included) Measurement law model approval: No. SS193 (meter body) Metrology law model approval: No. S191 (electrode) JIS format: Type 1 Waterproof: equivalent to IP67测量精度:±0.01PH±1Digit