. Fosi Audio ZK-1002D Mini Bluetooth Amplifier HiFi Stereo Audio Wireless Bluetooth Power Amplifier 100W *2 Dual Channel Digital Signal Amplifier Aluminum Body with AUX Input USB Input About this item Bluetooth 5.0 wireless streaming with a range of up to 12m (39ft) and two TPA3116D2 chips for a better experience, designed exclusively for customers pursuing HiFi sound. 100W *2(4ohm, 20Hz - 20kHz, less than 0.1% THD), comes with DC19V power supply. (Only for passive speakers, not for the active speakers). 3.5mm AUX, USB and Bluetooth inputs are available. When AUX cable is plugged in, it will automatically switch to AUX input and disconnect Bluetooth connection. Best for your PC / laptop, just connect it with a USB cable. No driver is required for better sound quality. Perfect for your desk or a smaller room in your home or office Specifications: Model: ZK-1002D Chip: TPA3116D2 Input Mode: BT, 3.5mm Aux/Micro USB SNR: >95dB Working Voltage: DC 5V-27V Power Adapter: DC24V 4.5A Channel: 2 CH Stereo Output Bluetooth Version: 5.0 BT Transmission Distance: 15m Max Power Output: 100W x 2 Terminating Impedance: 2 Ohm-8 Ohm Match Speaker: 50Watt-200Watt