Review on Pyle Marine Stereo Receiver: Water Resistant Bluetooth Amplifier for Boat, Car, Off-Road Vehicle | MP3/USB/AUX, Wireless Streaming | Wireless Remote Control included (PLMRM4BTA) by Tony Francis

The product photo is deceptive. No display, just a red/green LED. It's almost impossible to tell what you're actually doing and what mode you're in. The equalizer cannot be used without knowing what you are doing other than beeping here and there as feedback. Bluetooth pairing is a pain in the back. The sound quality is pretty bad. The first device I received didn't even work. I think for $20 it's almost not worth the headache. Take a slightly more expensive device, save yourself the headache.