2.0 dual channel Clear sound quality, strong spatial stereoscopic sense, enhanced auditory experience and equipped with V5.4 Bluetooth chip for stable signal transmission. Bluetooth V5.4 The connection distance can reach up to 15 meters. Faster, more stable and more power-saving. Zinc alloy shell 6 layers of craftsmanship /oxidation resistance, A+ drop resistance. The TPA3116D2 chip can reach a modulation frequency of up to 1.2MHZ, ensuring accurate transmission of audio signals. In addition, the high-power output distortion is less than 0.1%, which means that clear sound quality can be maintained at high volume. 4 layers of protection function Overvoltage, undervoltage, overheating, and DC detection circuit protection help you use it with peace of mind Product name:Hi-Fi Stereo Digital Amplifier Output power:50W+50W Frequency range:20Hz-20KHz Input sensitivity:280mv Speaker impedance:2-8Ω Bluetooth distance:15 meters Signal to noise ratio:≥98dB Audio input:Bluetooth+USB+AUX Distortion:Less than 0.5% Audio output:banana speaker jack Amplifier chip:TRA3116 Preamplifier chip:NE5532x2 Input power:DC12-24V Output channel:2.0 (The product appearance and printed words depending on the batch, but this does not affect use) Color: As Shown Material: Zinc alloy Package Contents: 1 x Hi-Fi Stereo Digital Amplifier Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.