Xrong Wireless Audio Subwoofer Amplifier, Audio Bluetooth, Powered Subwoofer. What You Get: RT-16F Amp,AC:100V-240V DC: 24V/4.5A power supply, user manual, our worry-free 24-month warranty, and friendly customer service. Adopt 2 pcs Texas Instruments TPA3251 chip. High-performance effectively improve output power and audio quality. Max power output up to 300Watt. The sound amplification mixer device is equipped with Bluetooth music streaming with a wireless range of 40 feet / 12 meters or more. Compatible with today's latest devices (including smartphones, iPads, iPhones and computers), this stereo amplifer is easy to pair with the receiver. Bluetooth 2.1 amplifier: Exquisite design, Upgrading, easy to use,great sound performance,Apply to outdoor landscape speakers subwoofer,outdoor bluetooth tv speakers,outdoor speaker The amplification subwoofersupports various external signal sources. supporting Bluetooth and standard 3.5mm AUX input can drive most home passive speakers, passive/powered subwoofer. SUB volume/Frequency, Bass/Treble control ensure Hi-Fi music quality;The default is Bluetooth mode when power on. When the AUX-IN of the rear board is inserted into the audio cable, it will automatically switch to the line input mode, and when the audio cable is pulled out, it will automatically switch to the Bluetooth mode.