About Sound Levels
To choose an alarm or speaker that’s loud enough, first determine the decibel (dB) rating of background noise.
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Megaphones
| Grip Type | Range, yd. | Power, W | Environment | Dia. | Lg. | Material | Batteries Included | No. of Batteries Required | Battery Size | Includes | Features | Signal Tone | Each | |
| Pistol | 266 | 16 | Outdoor | 9 1/8" | 14 1/4" | Plastic | No | 8 | C | Hand Strap | Push-to-Talk Button | Siren | 0000000 | 0000000 |
| Pistol | 900 | 20 | Outdoor | 7 3/4" | 12" | Plastic | No | 8 | AA | Hand Strap | Push-to-Talk Button | Siren, Whistle | 00000000 | 000000 |
| Pistol | 1,760 | 25 | Outdoor | 9" | 15" | Plastic | No | 8 | C | Detachable Microphone Shoulder Strap | Push-to-Talk Button | Siren, Whistle | 00000000 | 000000 |
Portable Public Address Systems
Corded
Wireless
Even with the built-in amplifier and speaker, these public address systems are light enough to carry from place to place. They operate on batteries or an AC adapter (sold separately).
| Microphone Type | Power, W | Ht. | Wd. | Dp. | Weight, lbs. | Weight with Batteries, lbs. | Cord Lg., ft. | Wireless Range, ft. | Batteries Included | No. of Batteries Required | Battery Size | Includes | Each | |
| Corded | 50 | 11" | 14" | 5" | 4 | 8 | 15 | __ | No | 10 | D | Microphone Microphone Cord with Plug Carrying Case | 0000000 | 0000000 |
| Wireless | 50 | 11" | 14" | 5" | 4 | 8 | __ | 300 | No | 10 | D | Wireless Transmitter Headset Microphone Lapel Microphone Carrying Case | 0000000 | 00000000 |