Model no.: e20ds Input impedance: 470 Output impedance:over10 Power supply:9v dc9v(6f22) battery9v adapter Current draw:8 ma Connectors:input jack, output jack, dc input Controls:level, tone, dist Dimension:130mm*82mm*60mm Weight:0.65kg Package: Each in daphon standard box or customized, then in carton Pcs/carton: 24pcs Carton size: 435*335*250mm G.W.: 21kg N.W.: 18.5kg Package: Each in daphon standard box or customized, then in carton Pcs/carton: 24pcs Carton size: 435*335*250mm G.W.: 21kg N.W.: 18.5kg