Douk Audio EQ5-TONE Mini 5-Band EQ Equalizer with Bluetooth Receiver Stereo Audio Preamp w/VU Meter

Warm Tips1.Without a power adapter, EQ5-TONE needs to be powered by separate USB power supply. Don't use the USB port of computers or share the power supply with audio source, otherwise common ground noise will be caused.2.Stereo RCA and 3.5mm AUX input are in parallel, two inputs and outputs will work simultaneously, So to avoid signal mixing, please don't connect RCA and 3.5mm AUX input at the same time.3.EQ5-TONE can input and output audio signal without power supply in bypass mode. However, if the signal hasn’t been preamplified, the VU meters will not function. Features 5-band EQ equalizer and preamp: separate and rich frequency band controls (75Hz/400Hz/ 800Hz/4KHz/10KHz), each band is processed by one op amp independently. EQ5-TONE can compensate for the defects of speakers and sound field by adjusting 5-band high, middle and low frequencies, and modify various sound sources. Adjustable VU meter and Bluetooth input: Dual large VU meter (45mm), driven by a dedicated VU driv