Audio Power Amplifier Module with Treble and Bass Control Bluetooth Power Amplifier Board for Store Home DC15 to 36V Item Type: Audio Power Amplifier Module Model: ZK HT21 Material: PCB Bluetooth Version: 5.0 (no occlusion, 15m) Input Method: AUX, Bluetooth and USB (toggle mode and song with wheel keys) Number of Channels: 2.1 channels (left channel, right channel and subwoofer) Power Amplifier Chip: TDA7498E Adaptive Power Supply: DC15 to 36V (undervoltage protection below 9 V, also supporting 12 V power supply) Adapter Speaker: 30 to 200W, 4 to 8Ω Output Power: Left and right channels ≤ 160W Subwoofer ≤ 220W Protection Mechanism: Anti reverse connection, undervoltage, overheating, overcurrent, short circuit protection