Check the listing for details. Kuryakyn 2719 Grey Road Thunder Sound Bar Plus. Color: Gray, Condition: New. Listed at 599.99 USD. Universal Grey Road Thunder™ Sound Bar Plus (2719) by Kuryakyn®. With 300 watts of peak power and increased versatility thanks to an integrated USB charging port, the Kuryakyn Road Thunder Sound Bar Plus takes handlebar-mounted audio to a new level. An internal 4-channel amp powers two 2" x 3" full-range speakers with dual voice coils and four high-frequency 1" silk dome tweeters with N42 grade magnets for powerful distortion-free sound at any volume level. Durable IP66-rated housings are weather-resistant, while built-in heat sink and self-protection circuit combat excessive heat and over/under voltage regulation. An internal 3.0 Bluetooth receiver allows wireless connectivity to any Bluetooth-enabled smartphone or music device, and auxiliary input and output ports connect standard devices via 3.5 mm cable.