Built-in subwoofer and tweeter for powerful sound, Audio is broadcast up to 100 * Transmitter contains 3.5mm input jack, USB charging jack, on-off switch and antenna, * Water-resistant construction for outdoor use, Illuminated rotary volume dial, * Blue LED light illuminates for night use, Uses 4 AA in Transmitter and 8 C in system, * 8 W x 8 x 12 D, Includes 2 AC power adapters