Car Bluetooth 3.0 4.0 Wireless Audio Receiver Board Stereo Sound Module Support Bluetooth Amplifier Speakers Diy Kit

? ? ? Features: 1.Wide voltage conversion module Bluetooth 7v-30v with anti-reverse design allows DIY friends without pressure.2.Bluetooth module output op amp with NE5532 pre-amplified output signal amplitude, promote common amplifier board without pressure.3.audio signals with automatic switching function, can guarantee the original amplifier or powered speakers to increase functional status under the Bluetooth function, the implementation of lossless conversion.4.using picture-board design, up to 4 shelves full effect SMT precision industrial processing.5.then the power output of the output signal can work automatically, Bluetooth priority.6.Power :7-30v wide voltage operation.7.PCB board size: 50x60MM8.stereo reception9.or 4.0 Bluetooth V2.0/3.010.effective transmission distance: about 10 meters, "about the real differences between specific environmental obstacles."11.can not be directly connected to speakers.12.can be an external Bluetooth antenna. External buttons can be ac