car speaker, speaker, car audio 1.RMS:60W 2.with remote control subwoofer box 3.with USB/SD/MMC slot Car Speaker, Speaker,car audio speakersModel No.:Y-406RMS ... Power Handling60 wattsSensitivity88 dBFrequency Response80 - 26000 HzImpedance (Per Voice Coil)4 ohmsWe got the FCC, CE, ROHS and other international certificates ... no best only better, so our products are more competitive. car audio