Open box. Only comes with the relay box untested SR504-4 Switching Relay Featuring front diagnostic lights for clear status, fuse-protected outputs and sealed relays for worry-free operation, and simplified wiring with switchable priority for ultimate flexibility. Flexible High & Low Level Trigger: Supports both High-Level and Low-Level trigger modes via a configurable jumper for each relay. User-Friendly & Safe Design: Features clear screw terminals for secure AC/DC wiring, a transparent cover for safety, and status LEDs for each channel (power and relay engagement).
eBay