COMPLETELY WATERPROOF: This is a marine speaker that's completely waterproof and can be used for several vehicles because it can withstand heavy water splashes and other outdoor conditions 100 WATTS POWER: The speaker has a 20 Oz. circuit magnet for a full range audio and complete stereo speaker sound system. The power output is 50 Watts RMS/100 Watts peak. It has a frequency response of 100 Hz-18 Khz and 4 Ohms impedance WEATHER RESISTANT: It's a weather resistant speaker made of Polypropylene cone with cloth surround for a rugged and durable design. It is also engineered with heavy duty molded ABS plastic basket and grill construction to combat sun damage LOW PROFILE DESIGN: Constructed with a low profile design that can be easily installed on boats, marine watercrafts and other off-road vehicles. The built-in molded grill and classic black look also gives extra style to the vehicle MAX Power: 100 Watt (RMS Power: 50 Watt) - 4 Ohm Impedance - 0.75'' Voice Coil 5.25” STANDARD SIZE: These marine speakers are easy to install with a standard size of 5.25 inches, complete wirings and mounting hardware. It has a universal standard OEM replacement size with a mounting depth of only 1.37” and cut-out size of 4.92”