NJW1194 low distortion front-end core, The output noise voltage of NJW1194 is only -117dBVtyp (1.41 μVrms), The distortion rate is only 0.0015% typ (Vin=2Vrms, VOL=0dB), Excellent performance Excellent sound quality can be obtained. Imitation wheat scene pointer TFT display screen. It can dynamically display pointer swing and has 7 sensitivity settings that can be from the remote control. And it can display volume, high and low frequency information, input channel and other information. Bluetooth 5.3 function, convenient for connecting to mobile phones. And with PCM5102 lossless decoding output. With USB player, capable of playing lossless music from USB drive, and supports APP selection on mobile phone. Attention: When using Bluetooth, please unplug the USB flash drive, as it prioritizes playing different audio sources and music with different sensitivities. To better display the pointer swing effect, you can adjust the sensitivity button on the remote control, and the display screen correspond to GO-G7. The larger the number, the higher the sensitivity Board dimensions: 110 x 88 x 30 mm Power supply voltage: 7-15V DC, DC interface 5.5/2.5 (The product printed words depending on the batch, but this does not affect use) Color:As Shown Material:ABS Package Contents: 1 * F9 HIFI Preamplifier 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.