Item Type: Signal Tower Product Model: BEM-X-50-2U-D Working Mode: Always bright with buzzer alarm. Sound Source: Built In Buzzer Sound Decibel: 80 Decibels Lamp Colour: Two Colours (red, green) Working Voltage: AC220V Product Frequency: 50-60HZ Light Source: Premium LED Installation Method: Folding bracket with disc base. Package List 1 x Signal Tower 1HIGH BRIGHTNESS: The ring shape toothed lampshade adopts optical refraction, which improves the divergence effect of the signal lamp and achieves high brightness. 22 COLOUR LIGHT: Eye catching red and green LED lights promises excellent lighting effect in the dark night. 3STABLE WORKING: Sturdy structure ensures stable standing when facing big vibration and heavy impact. 4EASY INSTALLATION: 180 degree folding allows the alarm light to mount flat or even, very easy to install. 5BUZZER ALARM: The built in buzzer alarm can make a voice up to 80 decibels, making the warning clearer. 6ABS MATERIAL: Very hard, resistant to high temperature and corrosion, and flame retardant as well.