Model: Depends on selected variant CU4200UK — Salto XS4 Controller (auxiliary). Two reader option. To be used with Salto design readers WRDMxx, WRDJxx, WRDGxx and Salto modular readers WRDMxx, WRDJxx. Can work offline, or online linked to a CU42E. CU42E0UK — Salto XS4 Controller (ethernet). Two reader option. To be used with Salto design readers WRDMxx, WRDJxx, WRDGxx and Salto modular readers WRDMxx, WRDJxx. Connection up to 4 CU4200 control units by bus 485. Product Type: Controllers Model Family: SALTO XS4 Controller Function: Depends on selected variant Housing Color: Depends on selected varient Power Supply: UK power adaptor .salto-specs{font-size:.9rem;line-height:1.45;max-width:720px;margin:0 auto} .salto-specs .spec-item{display:flex;gap:.75rem;border-bottom:1px solid #ddd;padding:.45rem 0} .salto-specs .label{font-weight:700;min-width:180px;flex-shrink:0} .salto-specs .value{flex:1} .salto-specs .value p{margin:.15rem 0} .salto-specs .value img{max-width:100px;height:auto;margin:.25rem .5rem 0 0;vertical-align:middle} @media (max-width:560px){.salto-specs .label{min-width:140px}}