HIFI Stereo High quality channel amplifier board for HIFI music. With AUX and Bluetooth two audio input methods, 2-in-1. 5.0 Bluetooth version, the transmission efficiency is higher, the transmission distance is farther. With a filter inductor, the sound is round and clear.Protection Mechanism The TPA3116D2 devices feature short-circuit and thermal protection as well as overvoltage, undervoltage, and DC protection to prevent failure. In the event of an overload, the device reports the fault condition to the processor to protect itself from damage.High Performance The TPA3116D2 is a Class D amplifier IC from TI that has very high index parameters. Advanced oscillator / PLL circuit uses multiple switching frequency options to reject AM interference. The modulation frequency can be up to 1.2MHZ, and the high output distortion is less than 0.1%. This helps prevent noise.Application With , treble and volume control, easy to adjust volume, enjoy the music tone what you want. TDA3116D2 is widely used in store solicitation, home theater, square speakers, etc.due to its excellent performance and comprehensive cost performance.High Quality It adopts copper DC connector and fence type terminal. It can withstand current, no heat, no damage to the wire. Free DC head lead, compatible with the input interface of this product, even if you dont have a DC head adapter or battery, it can be easily wired.Product Name: 2.1-channel Bluetooth audio amplifier moduleProduct model: -tb21Bluetooth version: 5.0 (unobstructed, 10m)Input sensitivity: 500mvInput : aux + BluetoothNumber of channels: 2.1 channels amplifier chip: tpa3116d2 (with am interference suppression function)Adaptive supply: above DC12 ~ 24V / 5A (the higher the voltage, the greater the output )Adaptive horn: 20 ~ 100W, 4 ~ 8Output : left and right channels less than equal 50W, subwoofer less than equal 100WProtection mechanism: overvoltage, undervoltage, overheating, DC detection and short circuit protectionsize:118x100x22MMMaterial:PC+metalcolour:BlackPackage Contents:1 x bluetooth Amplifier board1 x ScrewdriverOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.