parameter Model : AK-380 Rated frequency: 20-20 KHZ Signal-to-noise ratio: 90 dB Material: aluminium alloy Weight: 0,35 (kg) Channel: channel 2.0 Rated voltage: 12V Resolution: 47 thousand Impedance: 4-16Ω Color: Black Effective power: 40W 40W Maximum power: 400W 400W 📦List of things to pack 1 * power supply machine 1 remote control 400 W 400 W Hi-Fi Stereo AMPLIFIER Audio power amplifier AK-380, simple and compact, but practical Powerful, delivering peak power of 400 W 400 W and nominal power of 40 W No pop-up, no sound, Bluetooth connection, designed with think of high-quality sound for customers who are striving. Receiver with multiple amplifiers This audio amplifier is equipped with backlit displaywith LCD and volume control knobs, high and low tones, which allow individual adjustment of high and low frequencies for sophisticated sound. Wide range of applications      You can use it at home and take it to the car or outside. Ease of use Small audio amplifier compatible with two speakers with rated power of 40W, 4-16Ω. Power amplifier, remote control sound, U disk and memory card reading, plug and play