音箱喇叭型号：HP057-4U-0039C-A规格：57mm4Ω2W PU盆喇叭

• Size： 57mm H20 mm
• Impedance： 4 ±20% Ω
• SPL(1W 1m sine wave) 88 ±3dB(at 1.0KHz )
• Resonance frequency 180 ±20% Hz
• Frequency Range Fo~10KHz
• Rated input power 2 W
• Maximum input power 3 W
• Buzz & Rattle must be normal (at sine wave 2.8 V)
• THD MAX 5% (RATED POWER INPUT at1000HZ）
• Operating temperature -20~+60℃
• Storage temperature -20~+60℃
• Environmental Protection Regulation RoHS