Product Name: 40 mm Multimedia Micro Mylar Speaker for Doorbell Model NO.: SM40TD8-2.0H Brand: Jy Certification: ISO9001, CE, RoHS WORD nChannels: 2.1Channel Usage: Expand Volume, Monitor, High Fidelity Radiation Mode: Indirect Radiation Type Style: Mini Transducer Principle: Dynamic Earphone Cone: Polypropylene and Titanium Edge Transmission Mode: Air-conduction Category: Speaker Dimension: 40mm*5.0h Snr: 94dB Voice Coil Imp: 8ohm Rated(Max.)Power: 1.5(2.0)W Trademark: JY Transport Package: Paper Specification: 20mm*3.9mm Origin: China HS Code: 85318090 Product Description NOMINAL IMPEDANCE8± 15% OHMAT 1000HZ 1.4VppRESonANCE FREQUENCY615± 20%HZAT 1.4VOUTPUT S. P. L.94.6± 3dB(0.1w/10cm)AT 1000. HZRATED INPUT POWER1 .5WAT 1.4VppMAX. INPUT POWER1.5WAT 1.8VppFREQUENCY RESPonSE & DEVIATION500HZ ~10KHZOUTPUT S.P.L-10dBBUZZES & RATTLESSHOULD NOT BE AUDIBLE BUZZAND RATTLESINE WAVE BETWEEN AT 1.4V / 20HZ~2KHZDISTORTION5% MAX.POLARITYWHEN A POSITIVE D.C CURRENT IS APPLIED TO THE VOICE COIL TERMINAL MARKED +, THE DIAPHRAGM SHALL MOVE FORWARDMAGNET SIZESIZE: Φ12.5*1.5MM NdFeBFL.U.DENSITYST700GAUSS OR MOR