Specification: Origin: Mainland China Type: Voltage Regulator Condition: New Application: Speaker Supply Voltage: DC 12-24 V Model Number: Digital Audio Amplifier Board Ultra-micro version TPA3116D2 digital audio amplifier board Class D power amplifier board ultra-thin dual 50W Product parameters: Power amplifier chip: TPA3116D2 Power supply voltage: DC12-24V (power supply above 4A) Speaker impedance: 4Ω, 8Ω, 16Ω Speaker power: 50W*2 Audio input: left and right ground (LRG) three-wire audio input Product size: 38*25*2mm Pin description: CS: Short to GND for mute GND: negative pole VCC: Positive power supply SPR+: Output right channel positive SPR-: output right channel negative SPL+: Output left channel positive SPL-: Output left channel negative INR: Audio input right channel GND: audio ground INL: Audio input left channel Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. Included: 1Pc *Digital Audio Amplifier Board 1.Ultra-Thin Design: The digital audio amplifier board boasts an ultra-thin design measuring just 38x25x2mm, making it ideal for use in compact audio solutions. 2.High Output Power: With a maximum output power of 50W*2 (4/8/16 ohms), this ultra-thin amplifier board delivers powerful sound quality with clear and crisp audio. 3.Dual-Channel Stereo: Featuring dual-channel stereo sound with LRG three-wire audio input, this mini amplifiers module provides dynamic and immersive sound quality, making it perfect for home theater systems and other audio solutions. 4.Wide Input Voltage Range: With a working voltage range of DC12-24V (4A or above), this power amplifier board is compatible with a range of power sources, providing greater flexibility in its use cases. 5.Easy Pin Setting: This voice sound amplifier module features easy-to-use pin settings, including mute, negative, positive, and audio input pins, allowing for hassle-free installation and configuration.