d features electronics built in pre amp

JENSEN® Portable CD Player with AM/FM Stereo Radio, CD-490

QFX® Bluetooth® Cassette USB/SD™ Card/AM/FM/SW1-2 Radio Boom Box with USB Recording and Built-in Microphone, Black, J-230BT

PHILIPS Stereo Shelf System CD Player with Bluetooth, USB & Aux Input, Rich Sound & Bass, FM Radio, LCD Display, Remote Control, Sleek Design

GEMS Mini Magnetic Portable Speaker - Black: MagSafe Compatible, USB-C, Rechargeable

JENSEN Portable Stereo CD Cassette Recorder with AM/FM Radio (CD-550): LCD Display, Built-In Antenna

Monoprice Premium Bluetooth 5 Transmitter & Receiver With aptx HD, aptX, aptX Low Latency, AAC, and SBC Codecs And Optical And Aux Inputs

JLab JBuds Party Portable Speaker

Pyle Sound Level Meter - Decibel dB Meter with A and C Frequency Weighting, Max Hold, Data Hold, and Fast/Slow Time Weighting

Studebaker Portable CD Player with AM/FM Radio and Cassette Player/Recorder (SB2135)

Goodmans 2.0 Gaming Speakers with Color-Changing LED Lighting

Vivitar Home Theater Soundbar System with 2.25” Full Frequency Drivers, 2 Speakers and 6.5” Subwoofer

Pyle Phono Turntable Preamp Mini Electronic Audio Stereo Preamplifier with RCA Input, Low Noise Operation - PP777

Kikkerland Retro Karaoke Mic

Emerson® Bluetooth® CD/Radio Boom Box, Black, EPB-3002

Retro Portable AM/FM Bluetooth Radio Cream - Hearth & Hand™ with Magnolia

Razer Leviathan V2 X Bluetooth Gaming Speaker with RGB Lighting (1-Piece) - Black: Xbox Compatible

Emerson® CD/Cassette/Radio Boom Box, EPB-3003

OM SYSTEM VN-541PC Digital Voice Recorder

RCA AM/FM NOAA® Weather Alert Radio in Black

Jensen Wall Mountable CD System with Digital AM/FM Stereo Receiver and Remote Control

Audiobox® SoundRides TRK-2009BT SUV-Style Bluetooth® Speaker with WaveSync™ and Lights