Bluetooth CSR4.0 Bluetooth Amplifier Board Audio Receiver Preamplifier TDA7492P. Power supply: 2.1 interface DC 825V power supply. Audio input: Various versions of Bluetooth connection stereo input, using CSR8635 Bluetooth chip, Bluetooth V4.0, extremely high software compatibility. Output impedance: 8 ohms best (can drive 4, 6, 8, 16 ohm impedance speakers).Output power: add the front stage 5532 output power enough. DIP switch can be more convenient to directly adjust the gain of the rear stage amplifier, and better promote the damper with larger damping. Product upgraded with power input reverse connection protection. This mode automatically enters the pairing mode after power-on and searches for the display device name: SANWU Audio. 1TDA7492P Bluetooth Power Amplifier Board. The item "Bluetooth CSR4.0 Bluetooth Amplifier Board Audio Receiver Preamplifier TDA7492P" is in sale since Tuesday, July 24, 2018. This item is in the category "Consumer Electronics\TV, Video & Home Audio\TV, Video & Audio Parts\Amplifier Parts & Components". The seller is "goldy0903" and is located in Wuhan. This item can be shipped worldwide.