The Preco TAIL-GATOR® has set the quality standard for more than 25 years. Satisfied customers have made it the best-selling alarm in the industry. These alarms operate at 97 dB(A) and have #8-32 UNC terminal studs. Weight: 12 oz. (340 g). Preco offers a complete line of alarms with various sound levels and operating voltages to meet your alarm requirements on a broadrange of equipment and work environment noise levels. The back-up alarm selected should have a sound level that is audible above the surrounding noise level.