INTRODUCTION: The series of switching power supplies for measuring instrument have ruled out the inconvenience of bigvolume and heavyweight of a traditional power supply possess.The output voltage and current is controlled by two variable resistors with coarse and fine regulation for morehandy and precise adjustment. Features: 1, With more extensive range of in put volt age at 230Vplusmn10% 50Hz(115 Vplusmn10 % 60 Hz) 2,With high frequency operat ion can reduce the size of power transform er. 3,With small size, light weight and high density power. 4,Entire efficiency rate higher up to 70%. 5,Zero adjustment for the output of voltage and current. Parameter Specification: Operation Environment : Indoor use,Altitude up to 2000m, Installation Category II, Pollution degree 2. Operation Temperature &Humidity : 0℃to 40℃, <80%. Storage Temperature & Humidity : -10℃to 70℃, <70%. Cons tant Voltage Oper at ion (1) Output Voltage ranges from 0 to 30V /0-60V rating voltage with con tinuous adj ust ment . (2) Voltage regul at ion line regul at ion≦5m V. Load regu lation≦5m V. (3) Recove ry time≦50 0mus(50 % Load cha ng e, mini mum load 0. 5A ). (4) Ri pp le & Noi se≦5m Vrms, 10 0m Vp -p (5) Tempe ratur e coefficient≦10 0p pm /℃. Constant Current Operation (1) Output current ranges from 0 to 10A /0-5A rating current with continuous adjustment. (2) Current regulation line regulation≦3mA. load regulation≦3mA. Packing list Power Supply X 1 The Load Line X 1 The colour output line*5 Operation Guide X 1 Dear firend,hello,thank you for your support,for the new model DC Power supply,It has 110V and 220V. What kind of message you need to leave us a message, we will ship according to your request and address, please don't worry.