Red/yellow/green three-layer lamp, constant lamp beads are brighter and more eye-catching than tungsten bulbs Built-in buzzer, 90 decibel alarm sound, loud and clear sense of hearing Warehouses are used for workstations, inventory replenishment systems. perfect for any machine requiring simple operator attention perfect for operator stations, material requests, call lights, machine monitoring and more Can be used for cycle timing alarms, transition timing, shutdown status, maintenance confirmation, etc. Color: White & Red & Orange & Green Material: ABS+stainless steel+aluminum Package Contents: 1 x lampshade 1 x lamp shell 1 x support rod 1 x installation bracket Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.