Fangrui Product Details 1: Power Amplifier Chip: Rt7498e 2: Protection Mechanism: Anti-reverse Connection, Undervoltage, Overheating, Overcurrent, Short Circuit Protection 3: Widely Used 4: Long-life Ultra-quiet Fan (blocked Rotor Does Not Burn, No Noise) 5: Simple To Use And Easy To Understand Product Name: 2.1 Channel Bluetooth Audio Power Amplifier Module Product Model: Zk-ht21 For Bluetooth Version: 5.0 (unobstructed, 15 Meters) Input Method: Aux + For Bluetooth + Usb (the Dial Button To Switch Modes And Songs) Number Of Channels: 2.1 Channels (left Channel + Right Channel + Subwoofer) Amplify Chip: Tda7498e Adapter Power Supply: Dc15-36 V (under Voltage Protection Below 9v, 12v Power Supply Can Also Be Supported) Adapted Speakers: 30-200w, 4-8 Output Power: Left And Right Channels Less Than Equal 160w Subwoofer Less Than Equal 220w Protection Mechanism: Anti-reverse Connection, Undervoltage, Overheating, Overcurrent, Short Circuit Protection Product Size: 145x126x28mm Product Weight: Net Weight 327g Tip: When The Audio S