Fosi Audio HT4S Bluetooth Amplifier for Outdoor Speakers, 4 Channel Power...
Manufacturer: Fosi Audio. Part number: HT4S. Item model number: HT4S. All-in-One Amp: A mini amplifier that integrates DAC and power amplification. This stereo amplifier supports up to 5 channels output, switchable between 4.1 and 5.0 channels.