1.Description:
ZK-301B is a DC 12V 24V 30W TWS Bluetooth Amplifier Audio Module, perfect for DIY wireless Bluetooth speakers and transponders. It can receive Bluetooth music, as well as AUX/USB audio input. It also features a unique TWS technology that allows to combine two mono into stereo dual channels for wireless pairing. It also allows you to switch between mono and dual channels according to your needs.

This Bluetooth amplifier module is ideal for those who want to add a surround sound experience to their home theater, KTV, outdoor parties, and more. With its powerful 30W output and adjustable volume control, you can customize the sound according to your preference. It is also easy to install and use, allowing you to enjoy an immersive sound experience with minimal effort.

In addition, it also comes with a power switch, allowing you to turn off the power when not in use, saving energy. With its unique TWS technology, adjustable volume.

2.Features:
1>.TWS Bluetooth Pairing: It is equipped with TWS technology that allowing you to combine two mono amplifiers into stereo dual channels for wireless pairing connection. It also allows you to switch between mono and dual channels according to your needs. Enter/exit TWS by press potentiometer three times.

2>.Bluetooth/AUX/U-disk Audio: It can not only receive music via Bluetooth, but also via AUX and U-disk to fit different needs. It is capable of playing WAV, WMA, FLAC, APE, MP3 and APE music files.

3>.30W Amplifier: It features a built-in power amplifier circuit, allowing it to directly drive up to 30W speakers. All that is needed is sufficient power supply and matching speakers to achieve an outstanding music playback effect.

4>.Application: Perfect for home theaters, KTVs, outdoor parties, and more, this Bluetooth amplifier will improve sound quality and provide a surround sound experience.

5>.Easy to use: It is equipped with an adjustable volume control, allowing users to customize the sound according to their preference. Furthermore, it also provides functions such as switching to the next music, playing/pausing music, and turning on/off the power.

3.Functions:
1>.TWS True Wireless Player
2>.Bluetooth APP Control
3>.Bluetooth/AUX/U-disk Audio Input
4>.30W Single Channel Mono
5>.ON/OFF Prompt Voice
6>.Modify Bluetooth Name
7>.ON/OFF Bluetooth Password
8>.Modify Bluetooth Password
9>.Adjust Volume for Prompt Voice

4.Parameters:
1>.Work Voltage:DC 9V-24V
2>.Work Current:>3A
3>.Channel: Single Track Mono Output
4>.Bluetooth Version:BLE 5.3
5>.Audio input type:Bluetooth/AUX/U-disk/USB sound card
6>.Output power:5W-30W
7>.Output impedance:4ohm-8ohm
8>.Communication distance:15meter(Max)
9>.Over temperature protection:Yes
10>.Over current protection:Yes
11>.Short circuit protection:Yes
12>.Input reverse connection protection:Yes
13>.Work Temperature:-20℃~85℃
14>.Work Humidity:5%~95%RH
15>.Module Size(Installed):71*46*21mm

5. User Manual: