BJ-20A High Decibel Alarm Speaker Speaker Product Model: Alarm BJ-20A/30A Sound Form: Three types of dynamic coil speakers, alarm sound can be selected. Working voltage: DC12V/24V Rated power: 20W/30W Sound pressure: 120dB Working voltage: v: ac 220 dc12 Rated power: 30W Sound pressure (decibels): 120 Sound Form: Three types of dynamic coil speakers, alarm sound can be selected. External size: 124x145mm; Company Introduction: Shandong Zhuoxin Machinery Co., Ltd. is located in the economic capital of China, Shandong. It mainly engages in the production and sales of instruments, automation equipment, and complete supporting products. Its main products are sold to factories, mines, power plants, and universities across the country. Our products include non-destructive testing equipment, ultrasonic thickness gauges, coating thickness gauges, vibration gauges, noise gauges, infrared thermometers, pressure gauges, pressure controllers, oscilloscopes, power supplies, bimetallic thermometers, thermocouples, thermistors, temperature transmitters, proximity switches, rope switches, deviation switches, push-pull force gauges, testing machines, and other supporting products. BJ-20A High Decibel Alarm Speaker Speaker Product Model: Alarm BJ-20A/30A Sound Form: Three types of dynamic coil speakers, alarm sound can be selected. Working voltage: DC12V/24V Rated power: 20W/30W Sound pressure: 120dB Working voltage: v: ac 220 dc12 Rated power: 30W Sound pressure (decibels): 120 Sound Form: Three types of dynamic coil speakers, alarm sound can be selected. External size: 124x145mm; Company Introduction: Shandong Zhuoxin Machinery Co., Ltd. is located in the economic capital of China, Shandong. It mainly engages in the production and sales of instruments, automation equipment, and complete supporting products. Its main products are sold to factories, mines, power plants, and universities across the country. Our products include non-destructive testing equipment, ultrasonic thickness gauges, coating thickness gauges, vibration gauges, noise gauges, infrared thermometers, pressure gauges, pressure controllers, oscilloscopes, power supplies, bimetallic thermometers, thermocouples, thermistors, temperature transmitters, proximity switches, rope switches, deviation switches, push-pull force gauges, testing machines, and other supporting products.