AboutRowinCompanyRowinmusicistheprofessionalmanufacturesforguitarpedalwith9+yearsexperience.Wearethesupplierformostsellers.Rowinisaimtodeveloptopqualitypedalbutcomeatanaffordablevaluewhicheveryonecangetinvolvedwith.GettingfromRowinyouwillbeassuredwithmorereliablequalityandmoreprofessionalafterservice. Specification 1.TonalRange:12Hz~4186Hz(C8) 2.Input:1/4”MonauralJack(Impedance:100KOhms) 3.Output:1/4”MonauralJack(Impedance:0Ohms) 4.PowerSupply:DC9V(negativeinthecenter) 5.WorkingCurrent:90mA 6.Dimensions:95(D)*45(W)*48(H)mm 7.The 9V power adapter is not included. DisplayInstruction 1.Stepthefootswitchtointotonalmodel,theindicatorturnonandkeepsilent. 2.Operationshows”—”whennosignatureisinputintonalmodel,theindicatorofsolmizationandfinetuningwillbeturnedonatthesametime. 3.Theblueindicatorinthemiddleturnsonwhenthetoneisaccurate. 4.Thesignatureisbypassandnodisplayonthescreenwhileoutofthetonalmodel. Packageincludes 1x Tuner Pedal; 1xUsermanual