Product Name: Speakers Used for Mini Stereo Model NO.: TD-24SPK-4R Certification: ISO9001, ISO14000 WORD nChannels: Mono Channel Usage: Mini Stereo Radiation Mode: Indirect Radiation Type Style: Mini Transducer Principle: Piezoceramics Speaker Cone: Polypropylene and Titanium Edge Transmission Mode: Air-conduction Category: Speaker Structure: Double Moving-Coil Trademark: alawk Transport Package: Carton Origin: China Product Description SpecificationNo.ItemUnitSpecificationCondition1ImpedanceΩ4Ω±15%2Rated PowrW2.03Maximum PowerW3.04Effective Fequency BandHzF0~200005Resonant Frequency(F0)Hz500Hz±20%at 1V6Sound Pressure LeveldB83±3at 1w 1m Average 800,1000,1200,1500(Hz)7Distortion%5% MaxAt 1.0kHz, 2.0W8Buzz&Rattle v2.83V9Storage TemperatureºC-30 ~ +6510Housing MaterialPBT( Black )