Subwoofer for soundbar

ULTIMEA Skywave X40 5.1.2ch Wireless Surround Sound System, Sound Bar for TV Devices with Dolby Atmos, 530W Sound Bar with Wireless Subwoofer Amplifier

ULTIMEA Skywave X70 7.1.4CH Professional Wireless Surround Sound System for TV with Dolby Atmos, 980W Sound Bar with 10-Inch Wireless Subwoofer