TOA ELECTRONICS CS304 30W BGM/FGM spkr, xfmr, stainless steel - Wide-Range Paging Speakers for voice paging, background music and tone signaling distribution - Weather-Resistant to withstand demanding environmental conditions - High Sensitivity: up to 98 dB (1 W/1 m) - Built-In 70.7 V/100 V Transformer with screwdriver-adjustable power taps - Lightweight, Sealed Enclosure prevents moisture damage - Wide Temperature Range: -4 F to 131 F