Fosi Audio BT30D Bluetooth 5.0 Stereo Audio Receiver Amplifier 2.1 Channel Mini Hi-Fi Class D Integrated Amp 50 Watt x2+100 Watt for Home Outdoor Passive Speakers &Subwoofer Description 2.1CH Bluetooth 5.0 Power Amplifier: Exquisite design, improved operation, great sound performance. BT30D supports Bluetooth and RCA input can drive most home passive speakers and a passive/powered subwoofer. SUB volume/Frequency, Bass/Treble control ensure Hi-Fi music quality. Integrates 2 Texas Instruments TPA3116D2 chips. High-performance effectively improving output power and audio quality. Max power output is up to 200 Watts. Bluetooth 5.0 stereo audio amplifier receiver, increases the stability, sound quality and usable distance, streaming range up to 15m, works with latest devices including smartphone, tablets, laptops, computers, etc. Product Specifications: 2.1 CH Bluetooth Stereo Amp Power Adapter: 24V/4.5A DC Input Range: 12-24V THD: ? 0.04%, SNR: ? 98dB Frequency Range: 20Hz - 20kHz (±1 dB) Input Sensitivity: ? 280mV; Terminating Impedance: 2 - 8 Ohm MAX Power Output: 50W x 2+100W Input Mode: Bluetooth and RCA Bluetooth Transmission Distance: Up to 15m Package Includes: BT30D Amp, Power Supply, User Manual What's in the box 1 x BT30D Amplifier 1 x 24V/4.5A Power Supply and Ac Cord 1 x User Manual