Multi-functional FM radio, Bluetooth player, FM frequency modulation transmitter, car radio to Bluetooth converter

BT180 - A is a multifunctional audio decoder, integrating audio - decoding and FM (Frequency - Modulation) signal transmission functions, and is also compatible with the FM radio function. It has six - in - one functions, including Bluetooth audio, USB decoding and playback, AUX input, PC sound card, FM transmission, and FM radio. The selected chip is SOC, which integrates a 32 - bit MCU and a dedicated aDSP for audio decoding, adopting a hard - decoding method.

**FM Transmission Function**: It can transmit the audio signals of mobile phone Bluetooth, USB, AUX, and PC via FM, and then be received and listened to by a radio.

**Decoding and Playback Function**: It can connect the audio signals of mobile phone Bluetooth, USB, AUX, and PC to an amplifier through a 3.5 - audio output port.

**USB - Disk Decoding Format**: 1. It supports playing MP3, WAV, WMA, and FLAC formats, and has the functions of breakpoint memory and track memory. It supports a maximum of 128G.

**Bluetooth Reception**: 1. Bluetooth version 5.3, supporting HFP/A2DP/AVRCP/HSP/GAVDP/IOP/SPP/BLE, with a distance of about 10M. 2. Class2 4dbM, with a frequency range of 2.4G - 2.480G. 2. It supports the audio decoding of all bit - rates 11172 - 3 and ISO13813 - 3 layer3. 3. The supported sampling rates (KHZ) are 8/11.025/12/16/22.05/24/32/44.1/48. 4. It supports EQ sound effect setting. 5. It supports single - song loop playback and sequential loop playback of all files in the USB disk, and by default, it starts from the first song.

It further ensures the stability of the system and the sound quality. The audio signal can be set with an EQ sound effect mode, which improves the quality of FM transmission. Users can set their favorite mode according to the music playback quality.

**Bluetooth Transmission**: 1. Bluetooth 6.3V, backward - compatible with 4.0 - version receiving devices. If it cannot be connected, check the Bluetooth version.

**PC Sound Card**: It has a driver - free USB sound card function. The computer and the player can be connected via USB, and the computer audio can be connected to an amplifier or transmitted via an FM transmitter for radio reception.

**AUX Audio Input**: The audio signals of other players can be input through the AUX input interface and then transmitted via FM signals. At the same time,

**Radio**: 1. It displays the number of received radio stations, the current radio station number, the current radio station frequency, and has a memory - saving function. 2. The receiving frequency is 87.5MHZ - 108MHZ, and it does not support the Japanese frequency. 3. Automatic station search/manual frequency adjustment. 4. It has an on - board radio antenna, or an external antenna (self - provided) can be used.

**FM Transmission**: 1. Stereo transmission. If the input is stereo, it will transmit stereo; if the input is mono or mixed audio, it will transmit mono or mixed audio, and no setting is available. 2. The stereo separation is >35dB. 3. The transmission frequency is 76MHZ - 108MHZ, supporting global frequencies. 4. The frequency setting step is 0.1MHZ. 5. The transmission power is 0.5W. 6. The transmission distance is related to the environment and the receiving sensitivity of the radio. Of course, the biggest factor is the transmission power. Generally, it is 200m - 500m.

**Power Supply**: 1. It has an on - board lithium - ion battery with a capacity of 2800mAh, which can work for more than 8 hours without connecting headphones, and can be used while charging. 2. The charging voltage is 5V/1 - 2A. 3. It uses a TP - C charging cable. It can also be connected to an amplifier through the AUX output port.

**EQ Sound Effect Mode Functions**: Normal, Rock, Jazz, Country, Pop, Classical. 3. It supports EQ sound effect setting.

2. Before connecting headphones or a Bluetooth speaker, set the audio mode to USB or other modes first, which means turning off the Bluetooth reception of this product, and then turn on the Bluetooth transmission to avoid self - connection of the product.

3. Slide the Bluetooth switch to the left “On” position, and the Bluetooth LED will light up and flash to search for Bluetooth receiving devices, and it will automatically connect to the Bluetooth receiving device. After a successful connection, it will stay on.

4. It can only be connected to one device at a time. If you need to update the connected device, turn off the previously connected Bluetooth device, then turn on the device to be connected and make it in the connection - search state, and then turn off and on the Bluetooth transmission switch of this product, and it will automatically search for and connect to the new device.

5. Bluetooth can receive and then forward. It is necessary to first complete steps 2 and 3 above to confirm that the Bluetooth transmission has been connected to other products. Then, this product can be set to the BT Bluetooth reception mode, so that the received Bluetooth signal can be forwarded via Bluetooth again. This function can increase the Bluetooth transmission distance.

- **PC Sound Card**: It features a driver-free USB sound card function. The computer and player can be connected via USB, allowing computer audio to be routed to a power amplifier or transmitted through an FM transmitter for radio reception.

- **AUX Audio Input**: Audio signals from other players can be input via the AUX interface and then broadcast via FM signals. Meanwhile,

- **Radio**:

1. Displays the number of received stations, current station number, current frequency, and supports memory storage.

2. Reception frequency range: 87.5MHz–108MHz (Japanese frequencies not supported).

3. Automatic station search/manual frequency tuning.

4. On-board radio antenna or external antenna (user-provided).

- **FM Transmission**:

1. Stereo transmission: Transmits stereo if input is stereo; transmits mono or mixed audio if input is mono/mixed (no manual setting available).

2. Stereo separation >35dB.

3. Transmission frequency: 76MHz–108MHz (supports global frequencies).

4. Frequency step setting: 0.1MHz.

5. Transmission power: 0.2W.

6. Transmission distance depends on environment, radio sensitivity, and primarily transmission power (typically 200m–500m).

- **Power Supply**:

1. On-board 2800mAh lithium battery, operational for >8 hours without headphones, supports charging while in use.

2. Charging voltage: 5V/1–2A.

3. TP-C charging cable.