HIFI Stereo High quality dual channel power 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 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 itself from damage. High Performance The TPA3116D2 is a Class D amplifier IC from TI that has high parameters. Advanced oscillator / PLL circuit uses multiple switching frequency to reject AM interference. The modulation frequency can be up to 1.2MHZ, and the output distortion is less than 0.1%. This helps prevent noise. Application With bass, treble and volume control, easy to adjust volume, enjoy the music tone what you . TDA3116D2 is widely used in solicitation, home theater, square speakers, etc.due to 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 power interface of this product, even if you dont have a DC head adapter or battery, it can be wired. Product Name: 2.1-channel Bluetooth audio power amplifier module Product model: -tb21 Bluetooth version: 5.0 (unobstructed, 10m) Input sensitivity: 500mv Input : aux + Bluetooth Number of channels: 2.1 channels Power amplifier chip: tpa3116d2 (with am interference suppression function) Adaptive power supply: above DC12 ~ 24V / 5A (the higher the voltage, the greater the output power) Adaptive horn: 20 ~ 100W, 4 ~ 8 Output power: left and right channels less than 50W, subwoofer less than 100W Protection mechanism: overvoltage, undervoltage, overheating, DC detection and short circuit protection size:118x100x22MM Material:PC+metal colour:Black Package Contents: 1 x bluetooth Amplifier board 1 x Screwdriver Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real . The measurement allowed is +/- 1-3cm.