Features: 2pcs 4Ohm 3W 40mm diameter full-ranged auditory speakers subwoofer speakers Two mounted mini auditory speakers, auditory speakers subwoofer speakers, great for radio, multimedia speakers Can be used as wireless speakers, radio replacements, and also suitable for DIY soldering. 1.5inch type combined paper cones PU side configuration, powerful bass, clear and stable -high frequency. Strong double magnetic, neodymium iron magnetic, full power, naturally sound, high volumed suitable for wireless speakers, light speakers Specifications: Item： 4Ohm 3W 40mm Diameter Full-auditory Speaker Quantity: 2PCS Ranges frequency: 180~20khz, Resistance: 4Ω, Speaker characteristic Sensitivity: 88dB/W Impedance: 4Ω, Power: 5W Size：about 4x2cm/1.57x0.79in Package Includes: 2pcs 40mm magnetic full frequency internal magnetic speakers note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution