brand new and high quality Specification:Input voltage:8-48VInput current:5-10mAInput power consumption200-700mWQuantity: 1PcFit for Battery Type:lead-acid battery and Lithium batteryDimension:please refer to the pictureUsing Instruction:(1) for Key operation:The two white buttons on the back of the indicator are Kup and Kdn ,they are used to select parameters.(2) Batteries model selection:1.Power off the indicator2.Hold Kdn key3.Power the indicator on4.Release Kdn button,then the screen will display symbols in English: "Pbx" or "Lix" ,x is the number of cells, then users can select batteries model by Kup Kdn keys in the following order:Pb1: Pb12V lead-acid batteryPb2: Pb24V lead-acid batteryPb3: Pb36V lead-acid batteryPb4: Pb48V lead-acid batteryLi2: 2 pcs lithium batteriesLi3: 3 pcs lithium batteriesLi4: 4 pcs lithium batteriesLi5: 5 pcs lithium batteriesLi6: 6 pcs lithium batteries......Li9: 9 pcs lithium batteriesLiA: 10 pcs lithium batteriesLib: 11 pcs lithium batteriesLiC: 12 pcs lithium batteriesLid: 13 pcs lithium batteriesLiE: 14 pcs lithium batteriesLiF: 15 pcs lithium batteries Package includes:1 x Battery Capacity Indicator