Amplifier Bluetooth Compatible No Color Black Features Add Additional Loudspeakers to a Current Audio System Includes Volume Control Number of Input Ports 1 Overall Depth 1 5/8 in Overall Height 4 5/8 in Overall Width 6 7/8 in Product Type Amplifier Resistance Properties Water Resistant Speaker Maximum Frequency Response 40 kHz Speaker Maximum Impedance 8 ohm Speaker Minimum Frequency Response 20 Hz Speaker Peak Output Power 30 W Watts per Channel 30 W