Product Parameter

Power supply voltage: DC8-26V (recommended power supply above 24V 3A)

Bluetooth version: 5.0

Bluetooth name: HW-645

Output channel: Dual channel stereo

Output power: 2 * 50W/4 Ω

Support infrared remote control control

USB/TF card interface: Supports playing lossless MP3/WAV/WMA/FLAC files from USB or TF card, supports FAT16/32 file format

Product Descriptions

This product is a Bluetooth digital integrated dual channel amplifier board, equipped with TPA3116D2 amplifier chip and infrared receiver, which can be controlled through remote control or onboard switch buttons. Bluetooth playback mode, USB playback mode, and storage card playback mode can be selected to add FM radio functionality.

Equipped with power-off memory function, it remembers the songs played before power failure: using Bluetooth playback mode as an explanation. During use, when playing music, press the play/pause button to stop playing the music, then turn off the power and turn on the power again. You will hear a "Bluetooth Mode" prompt sound. Since the Bluetooth is already paired, it will automatically connect after hearing the voice prompt after power on. Then press the play/pause button to resume playing the music played before power failure.

Product Features

Equipped with infrared remote control function and infrared remote control. Support Bluetooth connection playback on mobile phones, support playback on USB flash drives and storage cards, and support FM radio function,

Product Instructions

Play mode

(1) Mode control

When the power amplifier board is not plugged in a USB flash drive or TF card, it defaults to Bluetooth playback mode when powered on;

When the power amplifier board is plugged in with a USB flash drive or TF card, it defaults to the storage card playback mode when powered on;

Switch modes through the remote control or onboard MODE button.

(2) Bluetooth mode

Switch mode broadcast "Bluetooth Mode" prompt sound, indicating that the HW-BT645 module has entered Bluetooth mode and is waiting for pairing. The device name of the amplifier board is "HW-BT645" found in the Bluetooth search on the phone. Click to connect, and the module voice prompt "The Bluetooth device is connected successfully" indicates that the HW-645 module has successfully connected to the phone, and music can be played. When the Bluetooth connection is disconnected, the module voice prompts "The Bluetooth device is ready to pair", indicating that Bluetooth is waiting for pairing.

(3) Storage card mode

Insert a USB flash drive or TF card, and the speaker will emit a "Music" prompt sound to play the stored audio files.

(4) FM radio

The module reserves FM radio antenna pads, and the playback mode can be adjusted to FM radio through the Mode button. When you hear the voice prompt "FM Mode", you will enter this mode and can switch channels through the Previous/Next button.

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