BT180-A is a multifunctional audio decoder, which integrates audio decoding and FM signal transmission functions, and is also compatible with FM radio functions. Bluetooth audio, USB decoding and playback, AUX input, PC sound card, FM transmission, FM radio, six-in-one functions. The chip used is SOC, which integrates a 32-bit MCU and an aDSP specifically for audio decoding. It uses hard decoding. FM transmission function: It can transmit mobile phone Bluetooth audio, USB, AUX, and PC audio signals through FM, and then listen to them with the radio. Decoding and playback function: It can connect mobile phone Bluetooth audio, USB, AUX, and PC audio signals to the power amplifier through the 3.5 audio output port. U disk decoding format: 1, supports playback of MP3, WAV, WMA, and FLAC formats, supports breakpoint memory and track memory functions, and supports up to 128G. Bluetooth reception: 1. Bluetooth version 5.3, supports HFP/A2DP/AVRCP//GAVDP/IOP/SPP/BLE, distance is about 10M, 2. Class2 4dbM frequency range is 2.4G--2.480G. 2. Supports all bit rates 11172-3 and ISO13813-3 layer3 audio decoding. 3. Sampling rate support (KHZ): 8/11.025/12/16/22.05/24/32/44.1/48. 4. Supports EQ sound effect settings. 5. Supports single song loop playback, the entire U disk file is played in sequence, starting from the first song by default. The stability and sound quality of the system are further guaranteed. The audio signal can set the EQ sound effect mode to improve the quality of FM transmission. Users can set their favorite mode according to the playback quality of the music.Bluetooth transmitter: 1. Bluetooth 6.3V, backward compatible with 4.0 version receiving devices. If the connection fails, check the Bluetooth version. PC sound card: Driver-free USB sound card function, you can use USB to connect the computer and the player, and you can connect the computer audio to the amplifier and send it out through the FM transmitter for the radio to listen to.