Features: 1CLASS A: Bluetooth sound decoder board is powered by dynamic Class A emitter follower, which responds to dynamic changes in current level during decoder operation. 2DISTORTION REDUCTION: Bluetooth decoder module can provide up to 4A current to maximize the dynamic effect of sound signal and minimize distortion. 3DECODER CHIP: Bluetooth decoder chip can support 32Bit 384kHz, by optimizing the surrounding circuit material to get good sound. 4CONNECTION: Default Bluetooth priority, wired input automatically disconnected when there is a Bluetooth connection, wired input automatically access when there is no Bluetooth connection, Bluetooth and wired automatically switch. 5POWER INFORMATION: Power supply does not need to distinguish between positive and negative, DC power is 8?32V 1A, AC power is AC 6?24V 1A. Item Type: Bluetooth Sound Decoder Board Material: PCB Voltage: DC 8?32V, AC 6?24V Bluetooth: 5.1 Package Included: 1 x Decoding Board1 x Receiver Stick1 x Antenna2 x Gasket1 x Nut3 x Connection Cable