Specification Brand : HiLetgo BulletPoint1 : XH-A902 NE5532 Audio Pre-amplifier Module BulletPoint2 : Wide voltage input DC12~30V, detachable chip, pure sound and low noise BulletPoint3 : Wide applications, it's suitable for pre-amp sound source amplification of all audio power amplifiers ItemName : HiLetgo 2pcs NE5532 Audio Pre-Amplifier Module Digital Audio Front Amplifier Board Pre-Op Amp Preamplifier 5 Times Wide Voltage XH-A902 DC12~30V ItemPackageDimensions_Height : 0.79 inches ItemPackageDimensions_Length : 3.94 inches ItemPackageDimensions_Width : 3.15 inches ItemTypeKeyword : audio-component-amplifiers Manufacturer : HiLetgo MaximumSupplyVoltage : 30 volts_of_direct_current MinimumSupplyVoltage : 12 volts_of_direct_current ModelNumber : XH-A902 MountingType : Surface Mount NumberOfChannels : 2 PackageTypeName : Standard Retail Box PartNumber : 3-01-1829 ProductDescription : Description: XH-A902 audio pre-amplifier board belongs to the audio pre-stage. There will be no sound when directly connected to the speaker. You need to connect the power amplifier to the audio output, and the power amplifier will have sound when connected to the speaker. Connect the DC 12~30V power supply to the power input end of the operational amplifier board, pay attention to distinguish the positive and negative poles, and VCC is the positive pole. Specification: Product Type: Pre-Op Amp Class Model: XH-A902 Chip name: NE5532 Number of channels: Two Magnification: 5 times Power supply: DC12~30V Size: 50*30*15mm Package included: 2 x XH-A902 NE5532 Audio Pre-amplifier Module 2 x Connect cables