ONN-M4T Φ50mm Industrial Stack Warning Light,DC12V DC24V AC100-240V Machine Signal Light CE Product Overview ONN‑M4T adopts innovative design with three colors integrated on a single layer . Equipped with double PC lens for soft, uniform light output and better visual effect. Optional built‑in buzzer over 85 dB provides clear audible alarm. Three kinds of mounting base available; pole length can be customized. Key Features ✅ Innovative Single‑Layer Tri‑Color Design Three