Specification: _x005f_x000D_ Origin: Mainland China _x005f_x000D_ Load range: Impedance 2-8 Ω, power 3-50W speaker _x005f_x000D_ Working voltage: DC2.5-5.5V _x005f_x000D_ Working current: above 1A _x005f_x000D_ Output power: 3-5 W _x005f_x000D_ Size: About 20x16x15mm/0.78x0.62x0.59inch _x005f_x000D_ Net weight of product: 2.5g _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Note: _x005f_x000D_ Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! _x005f_x000D_ Please allow 1-2cm measuring deviation due to manual measurement. _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Included: _x005f_x000D_ 1 x Amplifier Board 1. Efficient and Versatile Amplifier: LTK5128 is a 5W audio power amplifier chip that features single-channel AB/D class switching mode, low EMI, and a unique no-filter structure. The chip operates at a voltage range of 2.5V-5.5V, making it a good choice for portable applications. 2. Dynamic Range Control: The LTK5128 comes with a Dynamic Range Control (DRC) technology, which reduces distortion caused by waveform clipping during high-power output. This feature ensures superior dynamic response compared to other products in its category. 3. High-Quality Sound Performance: The LTK5128 offers low noise, low distortion, and excellent sound suppression capabilities, making it perfect for high-performance audio systems. 4. Multiple Protection: With built-in protection features like short-circuit current protection, under-voltage protection, and overheat protection, the LTK5128 ensures reliable operation and extends the lifespan of your audio system.