Add remote subwoofer level and EPICENTER effect control to your AudioControl EPICENTER Micro or EPICENTER Micro PRO. This dual-concentric design allows control of both your overall subwoofer level (inner/smaller knob) and EPICENTER effect level (outer/larger knob). Comes with a 20' remote cable and metal mounting enclosure (removable for custom flush mount installations). Please note that The EPICENTER Micro and The EPICENTER Micro PRO include the ACR-4 when originally purchased, so the ACR-4 is designed as a replacement product only. User Manual COMPATIBLE WITH The EPICENTER® Micro The EPICENTER® Micro PRO WEIGHT & DIMENSIONS Dimensions: 1.75”W x 2.5”D x 1.0”H Weight: 2.3oz (65.2g) IN THE BOX: ACR-4, Remote Cable California Proposition 65 To our California customers: Please view your Proposition 65 warning here.