1、INPUT OUTPUT: The amplifier board supports Bluetooth and AUX audio input, dual channel stereo output, with AM interference suppression function. 2、HIGH PERFORMANCE: Imported chip scheme is adopted, and the output audio is filtered, adopts high performance filter devices, with HIFI sound quality. 3、APPLICABLE RANGE: The power amplifier board is suitable for DC12-24V power supply and 15-100W 4-8Ω speakers, with a wide range of applications. 4、EASY OPERATION: After the digital amplifier board is assembled, connect the corresponding audio equipment, and then plug in the power supply to use it. 5、CIRCUIT PROTECTION: The power amplifier board has overvoltage, undervoltage, overheating, DC detection and short circuit protection to ensure safe operation. Item Type: Digital Power Amplifier Board Model: ZK 502T Material: PCB, ABS Bluetooth Version: 5.0 (unshielded, 10 meter) Signal to Noise Ratio: >90 DB Input Mode: AUX and Bluetooth Number of Channel: Left and right dual channels (stereo) Power Amplifier Chip: TPA3116D2 (with AM interference suppression function) Adaptive Power Supply: DC12-24V Adaptive Horn: 15-100 W, 4-8 Ω Output Power: 2 x 15W at 12V 8Ω, 2 x 30W at 12V 4Ω, 2 x 20W at 19V 8Ω, 2 x 40W at 19V 4Ω, 2 x 30W at 24V 8Ω, 2 x 50W at 24V 4Ω Protection: Overvoltage, undervoltage, overheating, DC detection, short circuit protection 1 x Motherboard 2 x Cover Plates 3 x Knobs 1 x Heat Sinks 1 x Connecting Wire 1 x Screwdriver 4 x Brass Standoffs 4 x Brass Screws 9 x Screws