Please read the title carefully before ordering {infomdescirption} Specifications: Simultaneous display of voltage and current Voltage measurement range: D0-100V Measurement range of current: 0-10A Power measurement range: 0-1000W Voltage error range: 1% (adjustable) Current error range: 1% (adjustable) Power supply error range: 1% (adjustable) Refresh rate: 300ms/times Display method: HTN LCD 3 rows of 3 digits Supply voltage: D7-12V Working current: lt; 15mA Operating temperature: -10 to 60 Equipment: 1 x Voltmeter Ammeter 2 x Cable / About service / On-time delivery Full refund if product not received within guaranteed delivery time < br/> Longer protection 15 days of extra protection after order completion Additional returns Return any product, only those in perfect condition Guaranteed quality Guaranteed Quality or Full Refund If you have any problems with avenos items or services, please don't hesitate to contact us first. before leaving negative feedback. We will do our best to solve any problem and provide you with the best customer services.