120 V AC, 50/60 Hz only. An unresolved 120/277 V caption in family specification 369987m p22 conflicts with its own rating tables and exact quick-start manual; 277 V suitability is not supported. No reviewed Home Assistant guide is published for this record while that conflict remains held. Exact single-device White retail clamshell DVRF-6L-WH-R, base DVRF-6L; finishes, multipacks and kits count as one base device. 120 V AC, 50/60 Hz ONLY. No neutral required at the dimmer; observe grounding and local electrical-code requirements. Forward-phase lighting control, not ELV/MLV, receptacles, motors or transformer-supplied appliances. LED/CFL lamps must be compatible and dimmable; 150 W is their combined limit, not 150 W each. Minimum incandescent/halogen load 25 W; minimum LED one compatible bulb, not a fixed wattage. Incandescent/halogen maximum 600/500/400 W depends on ganging; use the mixed-load chart, never add maximum ratings. No fins are removed on Diva controls. Single-pole wiring caps the blue conductor; mechanical 3-way requires the documented jumper/rewiring, not a generic drop-in companion. Three-or-more-location control uses qualified DVRF-AS accessories or Pico remotes, not an unqualified mechanical 4-way assertion. The retained spec 369987m p22 contains an unresolved 120/277 V diagram caption inconsistent with the manual and rating tables; 277 V suitability is held and unsupported. Follow original manufacturer installation instructions, disconnect the breaker and verify power is off before electrical work; consult a qualified electrician when uncertain. Documentation reviewed, not hardware tested. Account/app/Internet hub onboarding is separate from local everyday Home Assistant control. No stock guarantee, universal bulb compatibility, independent wall-button events, power telemetry or exact minimum firmware claimed.