XY S350H 220Wx2 350W 2.1 Channel Bluetooth Power Amplifier Board Support Custom Bluetooth Name DC 18V‑38V Bluetooth Speaker Audio Amplifier Module Item Type: Bluetooth Power Amplifier Board Product Material: PCB Weight: Approx. 375g / 13.2oz Bluetooth Version: 5.1 Signal To Noise Ratio: 92dB Frequency Range: 20Hz-20KHz Power Supply: DC 18-38V/10A Or Above Audio Channel: 2.1 Channels Audio Output: Left And Right Channels And Subwoofer Audio Input: Bluetooth, AUX, USB Drive, USB Sound Card Output Power: 2 x 220W (Left And Right Channels), 350W (Bass) Maximum Output Power Of Left And Right Channels: 220W/3Ω2--36VDC 175W/4Ω2--36VDC 100W/8Ω2--36VDC Maximum Output Power Of Subwoofer: 355W/2Ω--36VDC 250W/3Ω--36VDC 195W/4Ω--36VDC Subwoofer Adapter Speaker: 20W-200W/2Ω-8Ω Volume Adjustment: High End Encoder Knob Adjustment, Smooth Touch Protection Mechanism: Overvoltage, Undervoltage, Overheating, Clipping, Short Circuit Protection, Etc. APP: Support for YS Audio APP Control