d features electronics variable pitch control

SOAR NBA Shockbox LED Wireless Bluetooth Speaker

Pyle Wireless Bluetooth Streaming Gramophone Speaker with Built-in Subwoofer - PGMSP100

60W PA Horn Speaker for Indoor/Outdoor Use with 70-100V Transformer, Grey, + Clear Sound, Durable Design

beFree Sound 15 Inch Portable Bluetooth Speaker with Sound/Volume Reactive Lights

Yamaha WX-021WH MusicCast 20 Wireless Speaker (White)

SOAR Collegiate XL Shockbox Wireless Bluetooth Speaker

SOAR Collegiate Wireless Boombox Speaker

Pyle 8.0" Bluetooth Home Ceiling Speakers - PDICBT87, White

beFree Sound 15 Inch Rechargeable Bluetooth Portable Party PA Speaker System With SD/FM/USB Inputs

Gemmy Orchestra of Lights 1Watt Smart Bluetooth Outdoor Speaker in Black 1 Speaker

High Power Stereo Speaker Selector for Audio Systems with 4 Outputs, Easy Switch, Compatible with All Devices

SuperSonic 2.1 Channel Bluetooth Soundbar with Ambient Lighting and Wireless Subwoofer

My Audio Pet: Penguin V5.0 Bluetooth Speaker

Pyle Portable IPX7 Waterproof Shower Speaker - Outdoor Wireless Bluetooth, (Blue)

NBA Shockbox Bluetooth BOOMBOX Speaker with FM Radio

JBL Professional EON712 12 Inch Powered PA Speaker with Bluetooth

SuperSonic 30 Inch Dual Aux Optical 2.0 Bluetooth Soundbar With Remote in Black

JBL Professional EON ONE Mk2 10 Inch Rechargeable Column PA with Built-In Mixer & DSP

beFree Sound Dual 8 Inch Bluetooth Wireless Portable Party Speaker with Reactive Lights

beFree Sound 8 Inch 400 Watts Bluetooth Portable Party Speaker with Reactive Lights

beFree Sound Bluetooth LED Dancing Water Multimedia Speakers in Black

beFree Sound 12 Inch BT Portable Rechargeable Party Speaker

5.25" Wireless Bluetooth Streaming Speaker System for Home with Dual Speakers, Compatible with All Devices

Pyle 5.25" In-Wall / In-Ceiling Dual Speaker System - PDIW55