పెన్ యూజర్ మాన్యువల్లో పీక్టెక్ 5307 PH మీటర్
PeakTech 5307 PH Meter in Pen Safety precautions This product complies with the requirements of the following directives of the European Union for CE conformity: 2014/30/EU (electromagnetic compatibility), 2011/65/EU (RoHS).…