Features 1.Adopt high quality TPA3116 power amplifier chip. 2.Sound quality is very good, high efficiency and amplifying power. 3.50W*2+100W 2.1 channels(left/right channel and subwoofer channel). 4.Users can adjust the volume by knobs easily. 5.Usesr can adjust the volume by knobs easily.​ Specification Features: 1. Adopt high quality TPA3116 power amplifier chip. 2. Sound quality is very good, high efficiency and amplifying power. 3. 50W*2+100W 2.1 channels(left/right channel and subwoofer channel). 4. Powered by DC 12-26V, wide supply voltage. 5. Users can adjust the volume by knobs easily. 5. Applicable for speaker of 4-8 ohms. Specification: Model: HF26 Amplifier chip: TPA3116 Supply voltage: 12~26VDC Recommended power supply: 24VDC >5A Channel Type: Left Channel, Right Channel, Subwoofer Output Power: 50W+50W+100W(subwoofer) Output impedance: 4Ω, 6Ω, 8Ω Board size: 105*78mm/4.13*3.07in Package weight: Approx. 143g/5.0oz Package list: 1 x Bluetooth Audio Amplifier Board Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List