Speco's all weather professional marine communications speaker has a 4" polypropylene cone It features a 5 watt maximum power rating at an 8 ohm impedance. It is encased in white ABS plastic wiith stainless steel hardware, including a and 180 degree deluxe adjustable bracket. A 10 foot cable and 3.5mm miniature plug are also included. Technical Specifications Input Impedance 8 Ohm Size 4 1/2" H x 4 1/2" W x 3" D Voltage N/A Wattage 5 Watts