Features: Highlighting a 13 center neodymium iron magnet and diaphragm, this 50mm round alarm lecturer delivers a sound pressure stage of 105dB single meter. With IPX7 authentication, this lecturer withstands submersion in 1 meter of water for 30 periods, maintaining distinct standard in rain otherwise snow. Developed specifically for alarm sounds, this lecturer proposals a frequency response of 1.5kHz to 12kHz (±3dB), 8Ω resistance for vehicle enhancers, and low power consumption of 0.25A at 3W, stopping battery overburden. Constructed with a 50mm round plate and rubber border cessation structure, this lecturer boasts a 40% improvement in effect resistance and a continuous working life exceeding five thousand time. Weighing just 19g and measuring 50mm in diameter, this alarm lecturer combines a thin, brief with high efficiency, making it a essential component. Specifications: Sensitivity: 81±2dB/W Evaluated powerebog: 3W Product sizemail: 50mm Typolyethylenemail: Alarm Horn modthe: AFFECTIONATELY 0004011 Greatest powerebog: 4W Total musical distortparticlemail: 5% Weigheight: 19g Evaluated impedancemail: 8 Operating temperature extent: 18 60±2℃ Frequency extent: 470 8KHZ Package Includes: 50MM 8Ω3W internal magnetic basin waterproof speakerx1 note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.