The VPVT-4PB Series vandal-resistant speaker station resists damage from abuse, moisture, corrosion, dust, vibration, and extreme temperatures from 150° to -30°F. The station is available in a 15-watt model with a 12-gauge stainless steel plate mounted on the high-efficiency VT-series compression driver. The patented 8-ohm driver with water-sealed, die-cast zinc housing and exponential sound projector is renowned for its reliable performance and high intelligibility of voice and signal transmission. The controller functions as a speaker and microphone for hands-free remote station communication with a centrally located master control. Station assemblies are installed with tamper-resistant button-head screws in a flush-mount enclosure (order separately). VPVT-PB measures 7 1/4"SQ (184 mm) and mounts in the VP-77 model size cabinet