Teach your employees the importance of safe listening with the Califone Sound Alert Headphones. A bright red warning light on the earcup alerts users when the headphone volume exceeds the recommended 85 decibel sound level. These durable headphones come standard with a nickel-plated 3 1/2 millimeter plug with detachable 1/4-inch adapter. The headband is adjustable for a variety of listener head sizes and the padded leatherette ear cushions are comfortable and easy to clean.